I'd hardly say the club is letting all of the major players go...Carroll was sold for what we and all pundits say was 'silly money', Nolan left because he didn't want a bit part role and thought he deserved to still be around in 3-5 years time, and if Barton had just shut up in the press, and maybe been more receptive to a shorter contract extension, then he would also be locked up.
People act like there's been a parade of players out the door, but in reality nobody's even been forced out (yet at least)