This probably won't be a popular suggestion, but at least I tried.

You can't replace/stat replace a mutated king. If you have a mutated king and try to replace him with a high stat heir, his mutation gets erased. The only way to prevent this is to already have a mutated heir. But seeing how mutated 2k cubs are few and far between, that's a bit hard to do.

I was thinking of an option that enables someone to keep the looks of their current king, mutation included after playing a fee (Maybe 100 GB or so?). Or an option in the oasis that lets a person keep the mutation, but it can only be used once per account.

Anything suggestions to fix this would be appreciated.