I'm on second season, won Serie A unbeaten, with a few points above Juve. Sold Gervinho, because he always moans about wanting to go to a bigger team. Didn't buy any players the first season, but got Depay as a replacement the second. Would also recommend a solid defensive addition (cough, Balanta). I also sold Destro, as he was way too inconsistent and injury prone, and bought Munir (for a huge amount the second season).
I play with a 4-3-3 formation. Offensive wing-backs and a regista CDM (De Rossi is World Class). A trequartista and inside forwards. Playing a short passing game on fluid/flexible and control/attacking. Works wonders. Roma is a class team. Totti is still gold and scores and assists surprisingly much. Good luck!