Hello!
Thanks for your purchase and feedback!
I will try to answers those below
1. This has been in the works for a while, we're still exploring options on how the best to do that.
2. Sure! Some animations might not be possible, but if you have any suggestions let us know.
3. We did it this way so that when you export to 60fps and have more than 100 frames, it's easier to organize.
4. This is not possible at the moment and we have no plan to do that. This is much easier to do on 3D characters rather than 2D.