To be honest, I ask the same question for almost every mid-carder (who is known by more than 70% of the fans) in WWE.
Kofi Kingston has nothing left to do. He's stale and unexciting.
Evan Bourne is hated by WWE anyways, but who cares? He's stale.
Jack Swagger is my today's JBL. You see him, say "ughh", and change the channel.
Del Rio is extremely boring/stale. What is going good for him?
Daniel Bryan is champion, and who is taking him seriously? He's reached the highest mark you can get in WWE, and he's still a nobody. Nothing will change.
Cody Rhodes is the next in line for the main event, do we even care about him?
Dolph Ziggler for some reason is an online "God", but I personally find nothing new or exciting about him. He's moving up the main event, but there's nothing to him.
Ezekiel Jackson is a huge monster heel. These people don't get big and have been a stale character for years now.
Sin Cara is another Rey Mysterio. Unfortunately, the cruiserweight division is gone and his ideal competition left 10 years ago.
Sheamus is being used as good as Jinder Mahal's fan reaction. Though, I like him more than anyone else in the mid-card.
Zack Ryder is being praised, but his gimmick is more childish and embarrassing than Cena's. What will he possibly do after his alliance with Cena, he can't carry a promo/match, and also shouldn't be taken seriously by anyone over the age of 12.
Wade Barrett actually can be taken seriously and he works perfectly for a today's version of William Regal, but does anyone ever say "yes!" when you see him? He has no appeal.
Sorry everyone, but other than Cena, Triple H, Masked Kane, and Cm Punk, I can't get into anyone right now. WWE is too painful to watch, but I love the idea of what WWE has to offer. I'll continue watching and wait for it all to turn around, but right now I really can't get into anyone.