While it it true that it would keep with the animal trinity theme, it just seems odd to me that Kishi would have both Toad and Snake Sage Mode give the user Toad and Snake eyes respectively but not have Slug Sage Mode give the user Slug eyes, plus like I said before I'm not going to say that Hashirama's Sage Mode is Slug Sage Mode until I see him summon a Slug or Tsunade, Shizune or Sakura use it, but I doubt that Shizune and Sakura have the chakra needed for Sage Mode, because until we are told otherwise we have to assume that the same requirements that apply to Toad Sage also apply to Snake and Slug Sage Mode it there is a Slug Sage Mode, and Kishi has already had the chance to say if the requirements are different, he could've had Sasuke or Suigetsu ask Orochimaru about it after he was revived, it wouldn't have taken long and it would've made great foreshadowing for Sakura gaining Slug Sage Mode just by establishing if large chakra reserves is only required for Toad Sage Mode.
Oh and about Katsuyu's ability, I wouldn't call that immortality because it is still possible to kill her, you'd need a s*** load of salt, but you could still kill her. 
Yeah, I kinda understand your point too, but I'd like to take the assumption that the points around Hashi's eyes are supposed to resemble the Slug's 4 antennas. And there is a sort of change in Hashi's pupils when he enters SM.
Hashi's normal eyes:
http://mangastream.c...uto/34771730/18 SM eyes:
http://www.mangaread...t/naruto/621/12One thing's for sure, there is a noticeable physical transformation with Hashi's SM with the eyes. Though, how it relates to the Slugs will further be explained (unless somebody beats Kishi to it.)
Bolded: I didn't know that. But good point though, LOL
So i really have to say it again -.-
It seems like some of you guys have sakura as your favohrite character but in the end its seems like youve got a totally wrong picture of her.
You are whinning around that shes not fighting, got no new powerups and doesnt get screentime lately and now just because of this you say shes not heroine like. I have a complete different view of her.
Sakura was never ment to be the kind of heroine whos having fights, why else does kishi make her a medic? Shes ment to get her development from naruto, grow from hating to love him and be there for him. A lot of you guys have seenthe sasori fight and now you seem to think that this is ehat she needs to do to be a heroine but thats not true. Sakura got tons of development from naruto theoughout the series and did everything what a good heroine needs to do.
You say that its sexism to prefer a heroine whos not fighting and just beeing there for naruto growing from hating to loving him and naruto beeing the one who tries everything to win her heart, and thats just ....
I said it 100 times before. Theres a reason for kishi to not show her during the war arc, since her characte is on a stage where she is in conflict with her feelings and giving her interactions with naruto now would mean her feelings beeing resolved, but thats somethibg kishi wants to stall till the end. The war arc was ment to show how huge the whole naruto world is and to resolve a lot of character, like hinata as example.
Sure 615 would be a heroine like moment, but its not fitting for sakura since she has nothing to do with neji instead of hinata. Hinata is much more fitting for 615, she gets her shining moment and her character also gets resolved. Its not aking away sakuras moment, her time to shine is still waiting but as said it doesnt need to have anything to do with her fighting to support naruto.
Again, just because i see sakuras character as 90% based on love and also has the most of her development based on her feelings, has nothing to do with sexism, thats just you bringin reallife logic into a manga. This is nothing more then simple storytelling. Thats just a way how to write a character if you point towards an ending with the main character and the protoganist beeing a couple in the end.
I dont even know what keeps you reading this manga if you completly hate how its going so far but nevermind.
No, like Strider said, (at least I think he said it). It's not about her fighting, it's about her role as a whole to the series and hero. You seem to be assuming things. I've repeatedly said that (at the very least, I was implying) Sakura lacks moments that make her a heroine. It doesn't have to be fighting all the time. It can simply be something like her being there to act as a bedrock for him. All this time, she was there to see his dark moments (such as Jiraiya's death).
She's seen the many sides of him, and yet!! why was she shafted in 615!!!?? that would've been the peak of her journey seeing all the things Naruto's been through. The one time she could've done something to help Naruto in the biggest way possible so far was taken away by Hinata. At this point, I have to question Kishi: does he really intend to move her character forward or not??
It doesn't matter whether she had a connection with Neji or not. And may I quote (paraphrasing):
QUOTE
Sakura: Naruto, you've always been the one to save us all. You always put so much burdens on your shoulders. But this time, we'll fight together!!
Sakura was all about sharing the burdens with Naruto. Neji's death was supposed to make him realize that everyone is sharing the same burdens and that he doesn't have to fight alone. Her role was to help Naruto learn that he can share his burdens with others. But did we see that??
NO. Again, a moment where she could finally show him like the close friend she is that she's always there for him was taken away.
This way of thinking of yours is exactly what the chauvinists of pre-suffrage era used to think. If you actually agree with the notion that all the female characters are good for is just pairing fodder, then that is an
absolutely disgusting opinion. That's no different than saying all women are useless except doing housework and just think about romantic fantasies. If you actually believe that this is what Kishi intends, then all that says to me, is that Kishi is
sexist. And we definitely know that's not true. Look at Ino, Tsunade or even Mei and Kushina.
All of them aren't pairing fodders. Ino's beginning to grow out of her fangirl phase and that is most likely thanks to her two boys who care about her more than Sasuke ever would. Shikamaru is also a good influence on her as well. Tsunade, Mei and Kushina aren't just your average Kunoichi, they also have strong characterization.
Another thing, if I really were to apply real life logic to this manga, then the Tsundere trope wouldn't kittenin' make sense at all. And how Nagato's Deus Ex Machina's wouldn't have made sense either. And oh, several of the villains' freudian excuses wouldn't have even existed at all. Lastly, Sharingan and Senju DNA transplantation would also not make sense and exist because it is medically impossible. Regeneration?? yeah, not medically possible.
So really, your argument of applying RL logic to this manga is rendered moot.