I really don't have a problem with any of Farrell's in game managing decisions, including his line ups. That's not to say that I agree with everything that he does, but IMO, he is really no worse (or no better) than most of the other managers in the game.
I do agree that there is just cause to criticize or at least question Farrell for the seemingly lack of fundamentals, blunders, underperformances, etc.