I think the problem in a lot of ways is Ederson is one of a kind.
Steffen's a good keeper but the high-risk playing out from the back exposes his weaknesses. We either need a more Ederson-like back-up, or to tweak the way the team plays out of defence when Steffen's in goal.
Second half, the defence noticeably took better care of him, playing back passes to positions outside the posts.