I'm unsure if this has been done/previously said, but Destro and Verratti need slight PA boosts and quite a big CA boost. Destro so much so that he got into the provisional Italy Euro squad this summer as a Siena player (no small feat imo) and is deemed a suitable alternative to a big name striker if Juventus can't land Cavani or RVP. Verratti is quite self-explanatory; Best midfielder in Serie B last season, Pescara were not predicted to get near promotion but they won no small part down to him, PSG interested etc.
Piazon needs a huge increase imo, destroyed the U18's league/cup whatever you want to call it, the season just gone for Chelsea. If you've added Islam Feruz (spelling?) he needs a -9 potential from what I can see at least.
Bradley (Chievo) to Roma. Naismith to Everton, Ness to Stoke etc. (Loads of Rangers players have shifted since the newco scenario).
Just off top of my head.
Edit: Adrian for AT Madrid as previously mentioned, gets another vote from me for a big increase, he and Diego along with Falcao made Atleti a pleasure to watch last season. Falcao needs his injury proneness reduced imo, he gets ruined every save for me, when in reality he wasn't injured at all (or at least not for long) last season and is definitely the best goalscorer outside Messi/Ronaldo and thus I expect to see him still alive and scoring 3 seasons in, rather than a benchwarmer due to injury reductions! xD