Well, if Brodus gets into a program with Satino and American Perfection there's a storyline for him. Tensai seems to have some sort of hand in the Cena and Lesnar feud so that's pretty luxurious. And Ryback, well, he's just lying in wait. You can't say at this point they're not doing anything with them because through these squashes, they are establishing them. They may not have storylines planned in length (though with Tensai and Brodus I'd say they do) but that's not to say they can't make something out of themselves while they wait. A lot of fans don't see squashed like they used to, back when 3/4 of the match on some WWE programming was squash matches, but it's an effective tool and doesn't devalue the promotion, because in a lot of cases they can still be entertaining and they don't steal the spotlight from anyone else.
I think it's a great idea. You could argue that guys like R-Truth and Drew McIntyre right now are already struggling to get on TV on a regular basis, but that could be because there's no one credible enough for them to feud with on TV. Introducing these new guys is an opportunity to give more feuds to more people and more airtime because of it. I personally think it makes more sense to have a Ryback vs. McIntyre feud than it would be to have a Johnny Curtis vs. McIntyre feud (though it would be entertaining).
And now we have Cesaro coming up and really, there's no telling what he'll be doing. Presumably, something involving Theodore Long and Big Johnny, but you can't tell based off of the 2 minutes he was on-screen on Smackdown. We'll just have to wait and see.