Disagree, if you're playing a settled 4-4-2 then one of the 3 will be spending a lot of the time on the bench, sure for Newcastle it'll be great if come January and 2 of them are off at the ACN that you still have Carroll around but there's a bigger picture to look at. Personally despite the recent denials I reckon Ba would be the logical one to move on; he spent most of the second half of last season in Cisse's shadow and out of position anyway so let him go, get Carroll in and you're sorted not only pre and post ACN but during it also.
As for Carroll I always got the impression that he never wanted to leave Newcastle in the first place and it was Ashley that forced him out of the club and to sign for Liverpool?
I can't really remember fully but I think it was Cashley who prodded him out the door but I also remember him hearing that he wanted us to match the wages Pool were offering, Cashley loled at this.