Sasgay
Again, please do not call him this. It is not allowed here. Thanks.
It bothers me how much the meaning of the fore head poke has been twisted. Sakura doesn't even know what it really means.
It is quite confusing that it has morphed into the ultimate symbol of love.
It was always my understanding that Itachi had used the forehead poke fondly but also with intentional condescension. It came across as Itachi's way of sidelining Sasuke, placating him with a promise that he'd spend time with him later -- care about his feelings and issues later -- and that he couldn't be a priority until all of Itachi's important work was done.
Kishimoto choosing it to be the "loving" gesture Sasuke expressed to Sakura skewed the meaning it had had up to that point. Except for the fact that Sakura is obviously not Sasuke's priority, and that he isn't willing to spend any time with her until his important work is done -- whatever that might be.
Personally, I interpreted the use of the forehead poke between Sasuke and Sakura at the end of the manga to be a cover for the fact that Sakura's forehead had been sacred to Naruto. Since it was decided that Naruto would be stuck with the deadly dull Hinata, there had to be a way of making it seem as if Sakura's forehead issues and all that foreshadowing were retconned by Sasuke's gesture.
There's also the whole nonsense about the Uchiha loving so much and so deeply that it makes them crazy. They are all so long-suffering, don't you know? Maybe we're supposed to believe that Sasuke loves Sakura so much he must keep her at arms' length, lest it tear apart his very soul.
Regardless of the sheer stupid factor of it all, I expect SS to be depicted as a justified and solid relationship by the end. I think it's a mistake to be thinking that it's going to crash and burn.
The fact that it's poorly written, confusing, sloppy, and chock full of ham-fisted attempts at soap opera drama doesn't mean squat. The damage to the characters and the story was complete in November.
This gaiden is just the putrid icing on a rotten cake.