For one thing, i think we need a datablock counter for the Start Game menu. I get so frustrated when i have to restart server due to too many datablocks, so i'd like a counter atop the add-ons button that shows how many you have enabled and if it's over the limit.
Also, support for add-ons involving avatar parts would be nice. The same old hats, hands, legs, backpacks/capes/air tanks, ETC. are getting boring.