As I said, if a manager comes in and says he doesn't need Iniesta and loans him out to some C level team, while he brings Kante instead of him because said manager likes strong players, he'll be the enemy of the state in Barcelona, and he'd be excluded by the locker room right away. It wouldn't be like "all he's done is not pick him".
A manager doesn't have complete freedom at a club, and unlimited power, like some here think. You can't go to a team and eliminate every single thing you don't like. This is not redecorating houses you know, it's not like you buy a place and you don't like a vase so you throw it away, and you go to IKEA to buy another one, fancier.
You have to make some efforts in order to make it work at a team, that shouldn't resume to a buying spree. What if his team wasn't Manchester City? What if his team was smaller, with less money to just buy whoever Pep wants? In those situations he would have to make it work with what he has on his hands, including a keeper with Hart's profile. It's either that, or failure. But that's why he went at City in the first place. Because he knew their money would've made things a lot easier for him. It's just a whole lot easier to work with exactly the players you want, to cherry pick whatever players you like (minus 4-5 players who play in that position for the biggest teams, and can't be attained) and have them transferred at your service. Most managers don't always have that luxury, nor do they should. But Pep moves every 3-4 season, and only to financial power-houses, in order to make sure he does get what he wants.
But it's OK, I get his strenghts, and I also get his weaknesses. He's limited by his vision, and his vision is only achievable with filthy rich teams who can sign those top players with ease, or teams who perfectly identify with his style (Barca). What he is in fact doing post Barca, is create Barca 2011 clones, who each have some limbs that are missing. His style is beautiful, certainly the most beautiful I've seen, but his reaction to anything that even slightly goes against his vision is extreme, and bound to cause conflicts with anyone who think differenty and speaks out against it. So, in short, a genius, but also a dictator. A stylist, but also a person who doesn't seem to care much about those who are not part of his plans. And because he is only focused on what he sees as his vision and his great plan, he often ends up (willingly, or not) treating other players (or staff) quite badly in my opinion.