IMO Christian is only a mid-card guy in the first place. While he does show flashes of awesome, he's not consistent.
RIP, I generally like your posts on here and you always bring intelligent and valid points from what I've read so this is nothing personal, but I've absolutely got to blow this out of the water. Christian puts on the next best thing to Jericho type matches night in and night out. He's also got above average mic skills. I think its more to do with Vince's perception of Christian and his perception of Christian's ability to draw than it is Christian's abilities as a performer or entertainer.
Christian has been putting on consistently top teir matches both in singles and tag team for a decade now. He's one of the better mic guys the company has too. Part of his lack of a push is probably due to him jumping to TNA. He's the first real major talent to go over that performed well over there, and come back as a performer in the WWE.
This 1 or 2 week championship run for him though is really disgusting, and I imagine Orton had something to do with it with his political pull backstage as a #1 guy (the only person to really challenge Cena at all for that title while on RAW).
There's probably several reasons we can name for what happened to Christian here, but one of them is not his awesomeness as I understand and interpret the word (superior ring ability, superior mic skills, superior character depth....being able to draw is optional because some less than stellar guys in these areas have went their entire careers or large chunks of them w/o the heavyweight belt like Eddie Guererro). Nothing personal man but I just don't agree with that assessment at all. Well I do about him being a mid card guy in WWE, but not for the reasons you stated. It has nothing to do with his awesomeness or level of talent and everything to do with his ability to draw and Vince's perception of him as the top guy toting the belt around. If Vince doesn't see you as one of the guys that can be the face of the company, you'll either never get the belt, or you'll have the type of run Christian had (which is sort of reminiscent of Kane's first World Title win where he beat Stone Cold at a PPV, (might have been the one Big Show debuted at, or some bizarre ending that wasn't a clean pin) but lost the belt back to him the very next night on RAW.