If you're top tier in SkyTeam, CO should let you have an exit and/or bulkhead row. FWIW, if you get a bulkhead, I have noted that elites in seats on the right, DEF or higher, don't get bumped as often for special need travelers. If you can get it, IMO, the exit row is best.

One other shortfall of being a DL FF on CO is that you won't upgrade to FC. I read a thread on the DL forum that this situation may change later this year--I hope so!