We've been hard at work fixing bugs since the Godot 3.1 beta 2 last week, and our new beta 3 snapshot is a lot closer to what we want the final 3.1 to be like. We've reviewed the many bug reports filed in the 3.1 milestone over the last few weeks, and many of them have been resolved, or postponed to the next milestone when they were not critical. The GLES2 backend is getting more and more mature, especially for the web and mobile platforms where severe issues have been fixed.