I think Froome should stay with Sky but hold off trying to be team leader until 2014.
Froome still needs to get more experience. He's a great rider, but if you've got both Wiggins and Froome in your team (assuming that no-one buys out Froome's contract) then you still wouldn't rank Froome above Wiggins. Wiggins character strength and experience is worth more than a few good climbs.
I think Froome should stay with Sky but hold off trying to be team leader until 2014.
Froome still needs to get more experience. He's a great rider, but if you've got both Wiggins and Froome in your team (assuming that no-one buys out Froome's contract) then you still wouldn't rank Froome above Wiggins. Wiggins character strength and experience is worth more than a few good climbs.