The lag problems can just be fixed with more RAM or a better Graphics card. Same with better graphics, set all things to fancy and such, if not, texture packs were made for a reason. Mojang can only do so much on their side. I think a better AI for wolves would be great, enough updating all the bad mobs, get some more neutral mobs. I'd love to see Palm Beaches and such, maybe Tropical Archipelago biome or something
