allow any brick to spawn vehicles, play music, instead of specific ones
better vehicle physics with gears, sounds, grip, damage, etc.
lots of addons, too many to list, should become default (to name a few: newduplicator, 1randombrickpack (or really any good brickpack), glass, custom vehicle support, most of filipe1020’s and theturtorn’s vehicles, rally’s attack heli, technical, gore, vehicle events, etc.)
ingame addon creator, with vehicle creator, brick creator, playertype creator, particle effect creator, and weapon/tool creator. any script mods will be made with a scratch-like ui (like Scratch for Blockland) and you can edit any of the other things with the scratch ui (or by just coding by hand of course) instead of using their creators. maybe there would be a ui designer too if you wanted to make a ui for an addon
better colorset support, custom/personal colors saved clientside, and more fx
all of this will probably require some sort of huge backend rethink that will take a year but forget it a man can dream