This is an old quote (he gave it before he first faced Moxley in NJPW a while back), but it's completely on point. Guys who are great at some things and mediocre to terrible at others are often better to work with than pure jacks of all trades, because you can play to their strengths and weaknesses in matches and storylines. Rey Mysterio is interesting, for example, not only because he might be the best high flyer of all time, but because he's NOT a slick mat wrestler or power guy. The intrigue is in how he wins with what he has, despite the disadvantage it may put him at.
Think of your favorite wrestler, and there's probably shyt they just can't do no matter how good they are. For instance, CM Punk has a unique look, a brilliant wrestling mind, and is elite when it comes to promos, angles, and match layouts, but his actual wrestling technique seriously lacks in comparison to, say, Bryan Danielson, and he's never had great aesthetics no matter how hard he trains. That's where the intrigue is, though: how does someone like that get so popular and beloved he can sell out a building based on the RUMOR of his appearance?
You could, of course, do the same for Danielson (excellent technique and knowledge of wrestling, as well as how to sell his wrestling to any crowd he's in front of, but also short, on the smaller side for wrestlers, and not necessarily a super loquacious or creative promo...though he's probably pretty underrated when it comes to the more direct promo material). That's what makes wrestlers and matchups interesting, though.