I agree about the leadership part. I hope Jones will step up to that level.
I've always been a huge fan of Jones, and he seemed like a future captain for us// But there is one problem with that scenario - Jones is injury-prone. The reason we used to be so crazy earlier was that we had 2 leaders at the back, and they hardly ever got injured, atleast not frequently (Vidic and Evra)// And the remaining ones were strong characters too (Giggs and Ferdinand), so it was ok;; If Jones can sort out his injury issues, he'll be a beast, and a leader. But atm, Jones isn't our answer to that//
After having said that, I again reiterate, if we don't keep Joens fit, we're screwed. He was a beast, even in a 3 man defence (he was shouting and organising the defence on the pitch, even when Evans was making silly errors).