Just chiming in to say BRAVO again! One of the best games out there! Can't wait for the Kate content to heat up!!!
My two suggestions are things I think you've already mentioned as working on, specialmind, but just to reiterate:
1) Make different paths available earlier in the game like choosing to hang out/go home with Elise instead of Rosie.
2) If the MC has the "use power" option left for the final scenes, then it should be universal and able to be used in every sequence, like getting certain people to stay or do certain things. It should come up as an option almost every time in those final scenes (unless of course it's already been used and is in the refractory period).
But seriously, UNREAL game! Love it!