Definitely agree about lacking class players at the peak of their careers. That's true.
I also agree that Ferdinand and Evra are gone, their form won't come back, the writing's been on the wall for a while. I'm not sure about Vidic yet and Pirlo's incredible resurgence at Juventus shows that an intelligent central midfield player doesn't have to accept decline as soon as he enters his thirties. I'm not saying Carrick is as good as Pirlo, he's not but Pirlo was basically written off after years of struggling at Milan and he's two years older than Carrick.
Jones, Evans and Smalling will never reach the level of '08 Ferdinand/Vidic, that's also true. Then again, the league does not have a CB pairing nearly as strong as that one was. I believe they can reach the level that's necessary to win the league NOW. Joleon Lescott was a fixture in a title-winning team, Gary Cahill is a key player for Chelsea etc. You don't necessarily need the caliber of Ferdinand and Vidic at their peak. Even Bayern don't have that.
If we had, say, Vidal and Pogba playing with Carrick in midfield this team would look a whole lot better, even with all the flaws. They aren't realistic targets unfortunately but my point is that two quality midfield additions and a change to the system would go a loooong way towards fixing our problems. And I have to add that you're talking about our weaknesses from the aspect of competing with the top three... it's not the same as competing against Liverpool, Spurs and Everton. As many flaws as our squad has, I refuse to accept that these clubs have better squads.