I love all the new implementations the smaller size will encourage players to build in closer proximity to each other and so hopefully encourage more community based builds such as cities or collections of art/statues ect. I like the idea of reserving a plot at spawn for the CTA although I'd ensure it's at the edge to not interfere with other player's builds. Having the world vanilla will make an excellent use of the new biomes available, although I'd like to have features world painted in such as a mountain ridge or some interesting terrain. Now for my one suggestion: Enable mobs on creative, this seems odd and kind of pointless but limit them to a set number on each chunk and it should be fine, they are useful for certain things, people like pets, people can use them for builds such as farms, it could enable for things such as pig races or horse races and jousting ect. I think it opens up a lot of possibilities but that's just my opinion.