Damn, telegraphed since the chapter of "death". So much for so little...
I think that it was an option but wasn't planned and they were forced to add it to give the daughter powers. So she could fight and be a main character. Of course whether I am right or wrong, this is very by the numbers and generic.
To make my thoughts on this a bit clearer. "Do you believe they planned to give the daughter Kurama when they killed him?" That would require Ikemoto to care about another Next Generation character Kishimoto made, besides Bolt, enough to want to do a story with them.
Part Two has been Ikemoto addressing problems people had with part one to appease his bosses. One of those being that most of the casts' presence in the manga has been nonexistent.
For example, remember Neo-team 7 members Cups, Salad, and Konohamaru barely existed in part one and they were suppose to be part of the main cast along with Bolt and Nail. Konohamaru barely existed, even before Nail appeared, that it would be easy to forget, that he is suppose to be the Team Captain and Jonin Sensei. Therefore, the main cast main teacher and adult role model. Now, he may be involved only because Moegi has been absorbed and one of the tree people wants to eat him. Cups pretty much just hanged around Salad and they barely even talked about let alone developed his story with his "Sun" Bolt; until part two. For Salad, they seemed to actively want her to have nothing to do in the story till the very end of part one, where she is now in the lead to be Bolt's love interest.
So going off that. She was at best intended to be Moe's civilian love interest, before the executives had enough.
Sorry wasn't sure anyone was going to comment
Honestly, it not much of a problem one could already guess it would happen from last chapter and once you talked about spoilers (which means it was something that either interested or pissed off people enough to talk about.) It was clear what it was. I more just reminding of my policy of not looking at spoilers till the summary so it is an honest reaction and thought at the time. Then edit to fix mistakes. I needed to do something yesterday so I had to cut the ending short and came back to it.