Mostly because of that, I don't really care for "Lower visual quality" what does it really mean? I never liked HD 4K games, I'm fine with PS2 era. Besides, as far as I know, people are using Godot mainly for 2D, that shouldn't be an issue, less important for pixel games. (unless it means "Lower perfomance")
By features yeah, I think I it was my main issue with that Renderer, I wonder what are the other features not avaliable in 2.0.
Works on most hardware + Recommended for web games, well, I'm not interested in Web Games, but hell I do like compatibility, 3.0 says that it's "Incompatible with older hardware" does that means only the ones that don't support OpenGL 3? Or it needs more resources to run properly?
Anyway, yeah, "Shape Keys" are just Blender's name for "Blendshapes" they are used to modify vertex together with bone influences, mostly used for facial expresions, it could be used for extra details (but I'm only interested in facial expresion atm)