it would be really cool to have costume changing transformations,like for mutations,drink a beaker with a green fluid in it,for swordsmen/ninja,smoke cloud.Wonder what they could do for PAs,energy projectors,mentalists,etc.

Yep but it's limited by the emotes and powers we have currently and our ability to handle the bind codes (currently i put together the binds for several friends who don't have the time or ability to do so themselves).
Adding some extra emotes including a few with extra effects (i still like using the science crafting table for that pouring between beakers emote and i miss the inventions table bashing away with a hammer!) would help a lot and if we could have a drag-and-drop custom bind creator for those folks who aren't good with the bind codes it'd massively increase the usage of the feature.

Up!
Anyone else wants to comment? :P