I love how people say "it isn't about the booking". We wouldn't have Alberto Del Rio shoved down our throats, and "The Great Khali" wasting air time if it weren't about booking. That being said, since I've already done this once (the forum apparently got hungry), I'll try to make this one a bit shorter and more to the point.
Current wasted potential:
Justin Gabriel: This guy has had something about him since NXT, and hasn't been used properly since NXT. He needs some mic work, but there is a lot of potential waiting to be used. I don't see him as a top star in the next few years, but he should be on par with Cody Rhodes and a few others, and could work excellent matches with them, especially with the "Good Guy" image that seems to be written all over him.
Dolph Ziggler: He's been in main event matches, he's been on the mic. So the question is: what's missing? 1: Drop the "show off" gimmick, let him be what he is, #HEEL, a major heel. Let him drop Vicki, work on the mic skills a bit; he might not be a top guy just yet, but again, he has major potential.
Alex Riley: Give him a US title run first. But there was a response to this guy vs the Miz, it could be that everyone hated the Miz that badly for that angle, but he definitely had a reaction. Let him back in to a few major angles after WM. Against Wade Barrett when he returns, against Punk, let him and Ryder build off of one another. These guys need stories, angles to be built to reach the next level. To at least have that opportunity.
Michael McGillicutty. Let's see, so far: thrown into the dump of a tag team division, jobbed out, and overall, not used (someone tell me how that isn't about booking again? I'm not quite sure I heard it right.) I'd like to see this guy at least have a shot.
Tyson Kidd: See McGillicutty. This guy could be "the lance storm" of this current era (not big on comparisons, but hell), "The wrestlers wrestler", he trained with the hart's, has the chops, but it isn't being used. He's engaged to Natalya, again, isn't being used. Can wrestle more than he's being allowed to (look up older videos), but nope, he's small, so he has to be jobbed out, right? Because he's not Santino, I suppose.
One's I partially agree with:
Kofi Kingston: He needs to be elevated with a few story lines. Austin was elevated with Bret Hart. Michaels was elevated through stories with Marty Jannetty/The Rockers. Triple H was elevated through HBK. Randy Orton? Through Triple H. John Cena was brought up into his status by initial matches with Kurt Angle. To get to "the next level", Kofi needs one on one matches with someone; interview time, microphone time, he needs "to be built" beyond where he is. Absent of that, he just - isn't - ready. Until then, he just isn't ready. He can say it in a match with six guys, but one on one is the way it is most often done outside of stables (DX, Evolution, The Four Horsemen).
R-Truth: I've never been the biggest fan of killings, but he is making a lot of what he is doing right now. I expect that it will be turned up even further as time goes on, over the next few months.
One's I disagree with:
Alberto Del Rio: Absent of an image overhaul, this has been something rushed from the beginning and never built properly. More or less, he's been another character "shoved down our throats" right off the bat while others have been told to wait in line for their opportunity.
The Great Khali: Why is he still wasting main event spots? Because he's big? People complain about Cena having "5 moves of doom" and a slew of other things, but Khali wasting top spots just to be there is okay? Makes perfect sense. Really, it does.
David Otunga: Second in command of Nexus, on TV every week, paired up with Laurenitis to keep his face "on screen", and we're still, what? Waiting for him to make an impact? Letting him "gradually improve?" Really? He "hasn't been given his shot?" He's "going to be a top superstar?" The whole thought of this just, well, it's somewhere between being worried and feeling very ill. I'll have to invent a new word for it.
Jinder Mahal: ANOTHER foreign, rich gimmick? Awesome. But even with another Gimmick, I don't see Jinder ever doing much.
I could list everyone else one by one, but, nobody wants to do that much reading, maybe in another post down the road.