My notes:
1) I think guessing polygon shape right after importing a sprite is a bit frustrating, at least for me. Although it's a great feature I rarely use it, box collision shape is fine for me in most cases.
2) Search box in "Projects" tab is a necessity. I usually keep stuff highly organized but still it doesn't help me much.
3) Customizable number of undos
4) Make it possible to give an object some custom setup after spawning on preview because sometimes when you spawn a few similar objects but want them to be different size(or to have different variables) they usually end up changing together, at the same time. I try to make workarounds based on UID or IID and other stuff but it doesn't always help me.
That's all for now. Maybe I'll come up with other thoughts later.