If I can interject I feel like in the case of Mari, it can just be accounted to the red channeling more focus into her, perhaps even wrote it in a format as to make her champion. Or it could be made out as she's a natural born prodigy. Thousands of villians have the whole, I'm a one in a million born prodigy or once in a generation. And there's always the third choice of no explanation but the best one. It just works.I think the issue with setting different limits is that it results in having to put characters into categories that there might be disagreements about
For example, while I'm sure we all agree that it would make no sense for Marie to have high Martial Mari already has 35 Martial before she even knows how to really use the Tantu Totem so how do you cap it at 40 when she should just be starting out?
The next there's also the issue of equipment and powers, how does it make sense for someone's stat to be capped when they have access to constantly improving equipment and superpower serums
I agree that there should be some limitations, short of being given superpowers Marie will never have high Martial and Roxy will never have high Stewardship
The issue arises from drawing distinctions between characters that are good at things, for example Sam, Katherine, Lucy, Marie and Nygma are all good at Intrige but KC would have to make an official ruling on who has the potential to be how good
Basically, it's easy to define what people are bad at and should be capped on but far more difficult to define how good they are at the things they're good at and who should have a higher cap