>>58700136They're already doing that, powercreep's just making it so new signature abilities are basically multiple abilities rolled up into one package, see Rider Calyrex (literally two abilities in one via As One) and in not so literal cases, there's instances like Garganacl's Purifying Salt.
>total status ailment immunity>AND it basically acts as a resistance to ghost movesBack in the day that would only be one or the other in terms of effects, not both.