Pep has tried plenty of things during this time, not like this is the first time he is trying something, he changed many things but so far nothing has helped. I feel like at this stage if players are not willing, there is nothing Pep can do to change for the better.
The situation is not really the same as before and what Manchester City is currently getting does not mean Pep is not trying hard and the players do not want to obey the wishes of Pep because in the end, seeing the scheme, the placement of players and even the increased aggressiveness is a proof that they (Pep and the players) want to change their current performance to return to their original form where they are always the favorites and win in every match that is done.
The difference is that for now it is not the same as before where Pep who has lost too much momentum and is too comfortable with the usual scheme, this season has become unusable because indeed when the momentum has been lost for a long time slowly the players' mentality will also be lost, especially their schemes are easier to read when this happens which makes things not go as usual where good hopes must now be hampered for Manchester City.
But even so I still believe that Pep will still be at Manchester City and can build their momentum back after the half-season break, especially since the chance in the Champions League is still big enough to qualify even though for now their position is not favorable for them.