I read this as well, and I have to say I like it. I've always been a fan of sappier fanfiction (which this is not) but find it hard nowadays not to cringe at, and this managed to offer a lot of that sweetness while actually being a good read.
Schala's return has often flown in the face of something I think she served to demonstrate in the game: That you can't save everyone, and there's always a price to pay. I feel like this work demonstrates that, while still combatting the idea with Chrono Trigger's more positive half - dreams and determination. Hell, it runs on that, and the ending I think reflects that perfectly.