Liposuction machine as it's nearly impossible to lose/reset weight without restarting at the moment (as a 5ft caith, it took 54 years of standing still to get from 4300lbs to 140lbs, and ~15 minutes irl via autoclicker, while it only took 60m to get that big)
Some indication of how much each weight gain speed option affects gain (default = 1x, realistic = 0.5(?)x, ludicrous = 16(?)x)
Presets for skin and hair colour
Weirder intruments for voices (theremin, glass armonica, daxophone)