It's really not about Perez or RMAO... Barca is just too good...

Perez should try to tempt Luis Suarez or Neymar to join them, not because they're good (which they are), but to break that offensive lineup...
Ancelotti dismantled RM after the décima. Losing Di Maria and Özil was very costly, the mid-field has lost some quality. Then the trio of Cristiano, Bale and Benzema isn't quite as good as Messi, Neymar and Suárez. Not sure if Benzema is top level center forward, Suárez on the other hand unquestionably is. What's the problem with Bale is hard to tell, he probably plays out of position.