I will just posit as a very happy owner of 2011 Campy Centaur carbon 10s with Chorus CF crank...its a shame that 10s has devolved to single shift Power Shift and crappy Power Torque cranks. For this reason alone, moving forward if starting fresh I would just pick at least Chorus or Record 11s and be done with it. I wouldn't bother with Athena either for the same reason. I will say Campy is quite clever in their marketing to induce selling their higher level groupset. Campy UT cranks are fantastic and vastly better than Power Torque and as an owner of multiple shifting Campy...this feature is partly what makes Campy great. So for me at least when my 10s Campy groupset wears out...unless Campy gets a wild hair and re-releases multiple shifting with 10s which I think is unlikely, then it will a change to 11s for me...and not Athena....and my motivation isn't even another cog in back...but rather to preserve what Centaur was back in 2010.
My thoughts.