I'd have Carey back as long as Ryan Lowe thinks that he can fit him into the team, and that the siging fits in with Simon Hallett's vision.
A midfield with Carey and Mayor, Sarcevic, Fadz et al complementing each other and playing well should in theory cause a lot of problems for the opposition, L1 or L2. I guess with football as with any team it's more than just the parts, it's also the sum of the parts - what that makes.
I would imagine that clubs and players are mostly waiting to see what the Govt. and FL sorts out before making commitments.