In 2014 The Shield have been elevated to the level of huge stars and all three of them are focal points of the TV today, Bray Wyatt got moved from bizarre midcard freakshow to a six month run with the company's top man while Harper and Rowan went from lackeys to believable tag team title contenders, The Usos emerged from the pack to become the focal point of the tag team division, Rusev got moved up to the main roster and given a monster push (which he is still in the midst of), Wade Barrett got repackaged and given a new lease of life restoring much lustre to the Intercontinental title (only curtailed by injury) and of course, Daniel Bryan was elevated off the back of fan demand to the position of main eventing WrestleMania and being given the big belt(s).
But yeah, sure, nobody gets to advance.
The point about the Shield taken, let's look at some of the other folks mentioned here. Bray Wyatt - since he's finished his run with the company's top man - during which he was presented as a laughable threat at best after Cena's 'hallu-Cenation' episode and buried at John's hands - he moved on to feud with Chris Jericho, in a situation that WWE creative somehow managed to ruin. He's now focused on the Big Show, whose most notable RAW moment of recent memory is crying while he punched out old folks. How the mighty have fallen.
Rowan/Harper have gone from monster heels to also rans. Considering the list of challengers to the Usos titles is pretty short, and further considering that Rybaxel and numerous other thrown together tag team have been given a shot, I would neither call this advancement, nor a refocused tag team division. Rowan and Harper now spend their time jobbing out to the likes of Henry/Show and taking double chokeslams from Show himself last night. To say they're not taken as seriously as they once were is pretty apt. As for the Usos, the champs can often be judged by the quality of their challengers.
Wade Barrett - no doubt, he was given a repackaging chance and ran with it, and no one was more disappointed than I to hear he got hurt. So, let's look at his title instead - it's been exchanged between Miz and Ziggler (one of whom should be pushed to the MOON) and is now not even the focal point of the feud between the two wrestlers. Instead, we get dumb comedy double bits with stand-ins R-Truth and Damien (ugh) Mizdow.
Daniel Bryan - yep, he got the straps. He created a popular movement so organic that the WWE were faced with full-on riots had they not acquiesced to the demands of the fans...yet, right up until post-Royal Rumble, what was their plan? Batista. They called an audible, as smart companies will do when faced with consumer demand. Yes, they took Bryan and ran with him, once their hand was forced.
Rusev - I know he appears to be in the midst of a 'monster' push, but I sure wish they'd get to the point of it quickly. Rusev, crush is getting a little one-dimensional and his first major feud amounted to squat. Jack Swagger was elevated by the organic popularity of what he stood for, not the man himself, so what did Rusev gain from all this? A quick transition to the same feud with Mark Henry. Wash, rinse, repeat.
In short, while I agree with some of your points, I also think sometimes being on the main roster is confused with getting a push. One doesn't necessarily make the other, in my books. Nor does getting an initial push equate to talent advancement if that advancement is not sustained, and the old guard takes over once the fun is done. With Neville, Breeze and the Ascension all poised to come up in the next few weeks, I remain hopeful.