While I do believe Nintendo should have 1st party should be considered first, and that K. Rool should definitely get in, having a third party get in before him wouldn't do anything to this game. Would I like am. Rool more? Of course. However, this game was never about celebrating Nintendo All Stars, unless of course Ness, Falcon, Jiggs, and Marth were all stars at the time of their inclusion. All stars I feel is just a marketing title.
But I do agree with you that the asking has so many things going for him that he honestly should get in.
i don't know. Your logic is definitely correct, but that doesn't mean the devs will see it the same way. K. Rool obviously fits the whole fan service appeal, but that doesn't mean if there really are only two characters left, that K. Rool is for sure a lock. I won't be a pessimist because I love being optimistic, but there's no telling who they'll pick. It's like if they pick Dixie over the King. While other than the "relevance argument," K. Rool has just about every possible edge on Dixie, but I wouldn't put it pass them to include Dixie over the King. Would it make sense? From an "all characters are fan service" way? Probably not. But popularity alone doesn't guarantee a spot as we're all aware. So while logically I feel K. Rool would be an ideal choice, I wouldn't be surprised if he wasn't picked instead of someone else.