^True. He did a lot of rebuilding himself already. May not be intentional, but the post above gives an impression that Pep walked into a treble-winning team, played the same team for 3 years, and now that they are growing older, decided to leave, and not deal with the transition period.
Couldn't be more wrong. He came in, and since then, following left: Mandzukic, Kroos, Schweini, Ribery and Robben barely featured, i.e. consider them replaced, Martinez, barely featured in major chunks of the season, Dante, Luis Gustavo, and I may have missed some other players. But among there, at least 5-6 starting players, many of them were considered absolute leaders.
In the first half of the season, the following new players featured: Lewandowski, Thiago, Douglas Costa, Coman, Alonso, Vidal, Benatia etc. It wasn't like Ribery and Robben were missing when they were destroying teams right and left. There is no reason why the next coach should complain about anything squad related. Sure, he may wanna make some changes, but let's not make it sound as if Guardiola is leaving a team like the one Ferguson left at ManU when he retired.