I believe you are mistaken. We normally have a torrid time whenever we play with Bravo in goal. Its because all the opposition needs to do is take a shot, 90% of shots on target will end up inside the goal.
Bravo was a calamity in his first season. If Ederson was our goalie in Pep's first season, we surely would have finished far better than 4th. He screwed up in so many games that Pep had to bring Willy in goalpost.
Another factor was the ageing fullbacks who just didn't have the legs to fulfill Pep's ask.
What impresses me the most is that Pep knew what he needed to build a better team. He bought a phenomenal goalie as well as couple of best fullbacks available in Walker and Mendy.
I think most people ignore the tremendous impact Mendy had before his injury. If Mendy was fit throughout the season, we might arguably be having an even better season.
Another impressive thing is using Delph/Zinchencko as full backs. No one saw that coming and even though we had our fears on using them in that position, they have done a remarkable job.
Hats Off