Why go MK O.o? Personally I think Diddy Kong is better than MK on some stages. If you have problems with MK just use Diddy Kong. If you get him down pat you shouldn't have too much of a problem facing off against Meta... on Final Destination at least.
It's getting annoying seeing so many MKs . I like it better when people main someone that isn't used as much (Bio's ZGS / Pika + Anax's PT / Randoms for example).