"Reiko suffers from being a boring character in a game where being colorful and over the top is king."
So, you don't like the fact that he's wearing maroon colored clothes and that makes him a bad character? are you kidding me?
did you even try to play as him? he's like somewhat of a cross between Shao Kahn and Noob Saibot, who the hell wouldn't want to play as him,
also, you probably haven't read his backstory at all, he's actually one of the more interesting villains in the MK universe, being the intelligent type, having a long history with the elder gods, Shao Kahn, the Brotherhood Of Shadow and now in the new timeline he's one of the most powerful character to ever exist in the MK universe.