Game in general has really bland/bad visual design on its characters. Things are overly busy, overly detailed, overly overly. Raiden, for instance, is bland AF looking.
It doesn't help that they OBVIOUSLY only have 3 body types in the game with Male, Big Male and Female...which just further hurts stuff. They need to get away from the x-ray stuff and the ludicrous detail that forces them into having zero real variety on their characters. Games like SF, GG and Tekken are absolutely lambasting them in the aesthetic department.
MK would benefit greatly by VASTLY changing up their style for a change of pace. Embrace something like the style of MK: Snowblind where you would have stylized characters with stylized over the top anime-like blood & gore. It'd be an awesome visual shake-up for the series and allow more colorful and striking designs rather than this bland nonsense. (also Snowblind is just great in general and about the best piece of MK media in maybe like 2 decades)