It's not about how many moves you have, it's how you use them.
While I don't mind someone possessing a large arsenal of moves, virtually every superstar has their "five moves of doom." Shawn Michaels is who I consider to be the greatest in-ring performer in WWE history, and there's a few things you can almost always count on seeing when you watch an HBK match. Sweet Chin Music, top rope elbow drop, flying forearm followed by the kip up, suicide dive, weak-ass chops, maybe the occasional moonsault off the top rope in big match situations, etc. Stone Cold is probably my favorite of all time, and what did he do? Punch, kick, stomp a mud hole in the corner (and flip his opponent the bird in between stomps), Lou Thez Press, forearm off the second rope, maybe the occasional double-axe handle off the top rope, a bunch of brawling on the outside of the ring and occasionally through the crowd, etc.
It's actually beneficial that you don't see guys utilizing a whole different vast array of moves every single match because it makes it more special when certain superstars are forced to dig down deep and bust out certain moves that we don't see them use on a regular basis (like Cena with the hurricarana and the rolling yoshi tonic, or even an AA from the top rope) in order to win a big match.