Maybe an unpopular opinion, but I feel like the passing ability of keepers at Barca is overexaggerated. 90% of it is short range passes which most professionals can handle. I'd prefer a shot stopper who keeps the goals out and is strong in the air for free kicks and corners anyday.
Stegen has shown, especially 2 seasons ago in La Liga, that he can be a top keeper. He just hasn't consistently shown it and in the CL he hasn't come up big for us. People can say it wasn't his fault during the big losses (and it wasn't), but a huge save to keep it 0-0 early on instead of going behind can completely change the trajectory of a game. He just has never gave us that in the CL.
Look at the Madrid keepers in comparison. Some stand on your head performances in the CL which kept RM in it.