I like the ending, Shadowheart tells Tav that she wants to be together etc and it cuts to credits. It's a meaningful ending as both declare you want to be together.
It needs branching out though, as Shadowheart at the start of the scene refers to the "fun" night before, this will be the celebration that Gale and Tav want to do when standing by the water.
I would like to see the celebration party (pub) with Tav and Shadowheart together.
Act 3 could do with some more conversations from Shadowheart but all in all, Act 3 was pretty good for Shadowheart.