I'm working on HTA with some part of Annie's story right now. I don't know how much time it is going to take. If Unity takes another dumb move I might wanna rethink about continuing development of these game on their engine.
The unity move was incredibly stupid. Take your time if you feel unsafe using the engine though its definitely going to take a while to to move everything to a new engine.
It's a real shame because I have learnt so many things on this engine that I was confident tease my future titles. Now if I think I may not be making or will make waterdown version them. Reflection, Magic Ring, HTA 2 and Survive 2.