Anyone who's character has gotten boring is the fault of WWE.
There are a ton of guys like: Orton, Big Show, Sheamus, Mark Henry, etc. who I'm beyond bored with, but is that really their fault, or the fault of the writers? Mark Henry had one of the hottest runs of his career over a decade in with the hall of pain and the fake retirement. Big Show almost felt credible again after 1 promo when he was about to go against Lesnar.
So anyone saying Del Rio was boring or whatever, thats not on him, he's a great performer. Very solid in the ring, very solid on the mic. I would love to have him back to get to see him work with some of the guys he never really got a chance to before leaving, especially Kevin Owens.
Yeah Del Rio's good but they need to change the way they use him. I'd love to see him feud with HHH if they want to seem realistic. Or just have him in the tag division with Ricardo, they could be the poor man's version of the Los Guerreros.