Having just built my own UI framework using MonoGame, Friflo ECS, and C#, this list is spot on for the kinds of problems one encounters when building a UI framework.
I'm creating something quite similar to this, although I literally got started yesterday lol
Do you have any links regarding your framework?
It has been a pleasure learning and practicing Rust with Bevy. Making games, simulations, and art is why I started doing all this anyway.