never said he is definitely selling stones, saying it is an option to him to sign ready made players which in the short term would bring bigger success compared to coaching a 21 year old there instead. 
but he also planned to be at chelsea for a long time the second time around and to be fair if the team hadn't stopped playing for him, he would still be there.  So selling his best young talents off was never a 'because i had this player' move, it was just to move money elsewhere to sign other players, as you say for FFP.  The players in question were the best of a mixed bunch of youngsters, but if you sign enough young players then one or two will be better than others. I mean luakaku alone cost the club double figures when he arrived, so there was definitely a plan to actually use him before Jose came along.  The reason why he sold him, i believe was to raise money to sign other players he wanted, and with costa there, he could sell him on, with the FFP rules resetting allowing him to buy him back when he became the finished article.  Probably the same with Wolfsburg, sell him on for a modest fee, sign him again when he is ready to slip straight into the team, ergo, continue success in the short term.  It is like looking at our team now, sell stones for example and sign willian and matic.  Would our team improve?  Yes it would, quite a bit to be honest, but over the long term we lose a player that would be worth more than we sold them for meaning that quality would be what we are chasing then. 
I would personally take him because he is a massive step up from previous managers so i'm not going to be anti roberto and then turn my nose up at a winner, course i'd be happy seeing him manage us, and the impact on some of our players would be massive tbh, playing for a manager who has done it all rather than relegated teams. 
Chelsea is an enigma though, they can manage themselves when they need to, or at least could before the phasing of the guard.  the same players who managed themselves under grant, under Di matteo, both after stopping playing for their then managers.  the players can afford to do it because after him they got hiddink, they are getting conte, that woudn't work with us as we don't have a queue of top managers waiting to take over. 
  A lot of perspective is on mourhinio at top clubs where the players expect to be winning everything, a positive is that put him at a club where the team are not at that same mentality and you get hopefully a team who can run through brick walls because the man telling them to has done it already several times over.