Pep could put him in the Alonso role
Could, sure! But more likely than not wouldn't. Silva will most likely play as one of the 2 CMs ahead of the DM. My sense is that it will be Yaya at DM with DeBryune and Silva head of him if he adopts his Barca system, or Yaya and Dihno at DM with one of Silva or DeBryune ahead of them.
Since he tends to favor speed and skill out wide, assuming he doesn't bring in anyone (a silly assumption coz he will) Navas and Sterling are most likely to flank Aguero. Sterling will require considerable work on his possession skills, more so than anyone else. And if he doesn't pick it up quickly, he is the guy the Sane or alike buy, will attempt to replace.
My sense is that Pep will give everyone s chance. Mangala will probably get a year under Pep. The high pressure and ball skill work would probably dibhim lots of good, but I think in the end, lime Dante at Bayern, he'd get moved.
The player I'm most interested to see under Pep is Kolarov. Will he adapt or continue going rogue often?
Anyway, can't wait. There is gonna be lots of wigging out by fans when he doesn't do what they expect. It should be fun.