I occasionally do some 2D animations mostly just simple silly emotes and gimp is proving to be a bit limited. So I looked at what 2D animation stuff flathub has to offer and there are several. The ones I found and that looked promising were synfig studio, pencil2D and glaxnimate.

Does anyone have any experience with those? How do they stack up in terms of features, user-friendliness and maturity of the software. My only real requirement is that it should also be able to do some stuff with regular image files even if many things will probably work better with vectors. I will mostly be doing very basic stuff.