Not too sure about this Rodgers appointment but would be happy to be proven wrong.
You could have all the football philosophy and ethos in the world, but if you don't have experience playing alongside, working with and controlling star players, egos and personalities, it could all come to naught i.e. what happened with Andres Villas Boas.
Guardiola for example was a success with Barcelona because apart from having clear ideas about how he wanted to play, he already had a stature and earned respect within the club. Even so, his first order of business was to discard all the disruptive big name personalities in the dressing room, Ronaldinho and Deco (Eto'o as well before he had a last minute change of heart) and bring in players who he knew would play for him. I firmly believe if he had not done that, Barcelona would never end up where they are today.
Rodgers similarly has clear ideas on how football should be played, but he inherited a Swansea team from Martinez that was already on that course and the players he had were no star name players that would be averse to learning. Compare that with Liverpool with seasoned professionals who have had years of individual success playing a totally different style of football and it looking like pressure. Plenty men in that side who i don't see adapting to that style of play. If I was him, i'd get rid of Steven Gerrard, Jamie Carragher, Stuart Downing and Andy Carroll from jump.
Carroll especially must be livid, if he thought he wasn't getting enough hoof out long ball last year to jump and play big body business with defenders then this year will be like the Sahara.