Nerf Everything. Gut Everything. No Fun Allowed.
Sure you can you just trim out the fat, Hell Cetrion might as well be a 1 variation 1 playstyle character already.You know, I'm kinda split on some characters who were born in the variation system like Cassie. It's like in MKX I can see her different variations and understand the differences between them; ultimately I chose Brawler and she was one of my mains actually. But in MK11 I felt like I couldn't get back to play her, she was too different and none of the options available gave me anything close to her "original" Brawler variation. The structural gameplay differences between MKX and MK11 are probably a factor too, but I'm talking more about legacy.
The new characters introduced in MKX and MK11 are probably more difficult to adapt to a "no variation system" since they were developed with variations in mind. I think that's a big difference compared to the legacy characters. Cassie might be "Brawler" to me, but to others she could be Spec Ops or Hollywood... and you just cannot squeeze all those playstyles into one character, it just won't work.