The problem is that the game is updated at an absolute snails-pace. One single group of modders can put out more new mobs and behavior packs in two months than the the actual developers can do in two years. I don't know what's going on over there at Mojang, but there really is no excuse for one of (if not the) best-selling game of all time to still be getting such poor update times.
When Hytale eventually comes out, Minecraft is going to get brutally murdered so swiftly that the devs are never going to know what hit them. Hytale is positioning itself to be better than Minecraft in every single way. Modability, graphics, basegame content, dynamic sound design, far more options for minigame building (being able to take control of ANY creature in the game just by itself dwarfs anything Minecraft ever has and probably ever will do), and who knows what else.