I think anyone who is willing to see anything beyond blind faith knew what was likely to happen last night, after all it's not the first time. I think I get what Pep was trying to do, ie rest players for "harder" matches coming up, but his faith in a number of players is sadly misplaced. Add in that the ones he has been able to trust in the past (Ake, Stones and even Marmoush and Lewis to some degree) are for one reason or another not the players they were (or in Lewis case promised they might become).
I've argued before that we're not a great team anymore and last night summed up why. A great team would have overcome the difficulties caused by the changes, or at least had a bloody good go. Our "B" team couldn't do that.
Many have commented on how poor our recruitment has been over the last 2 or 3 years and it's hard to disagree, however when you look at the calibre of those we've had to replace, Kev, Silva, Aguero, Mahrez and going a bit further back Sane, Sterling, Fern, then its easy to see why. Replacing that level of player is almost impossible. Rodri for Fern, Haaland for Aguero and thats about all we've come close to.
Not sure what the answer is, because finding that calibre of player is not easy, but I'm pretty sure replacing the best manager in the world isn't the answer