Not sure about the idea of sticking rigidly to the Barcelona template, don't see any manager currently playing Guardiola style football and being successful to go along with it. The game has moved more towards physicality, intensity and sitting men behind the ball with fast transitions. The teams that contested the CL final play like that. I think if Arteta, Vieira or any inexperienced manager tried fielding a midfield trio like we've played under Guardiola you'd see games finishing 5-4, 5-5 etc. Even if they turned out to be good managers they'd still most likely be very pale imitations of Pep who is the one and only genius of this style of play.
I'd be interested to see what Simeone could do after Guardiola. Would command instant respect to let everyone know it's not time to slack off and has the same maniacal drive to improve his players. Sure he doesn't focus on positional play or exploring the half spaces or any of that nonsense, Klopp and Pochettino have shown you don't need any of that to do well in champions league.