I rewatched the highlights of the Stoke game at Ewood earlier in the season. No obvious howlers, but note his positioning on the save at 1:00.
Its a particularly good camera angle to highlight the problem. Yes he reacts well to parry, but look how much room he's offering on his near post. A half decent striker glances up and strokes that home comfortably. That's criminal keeping at this level, even if at first glance it looks like a good moment for him. This is back when he was in his so called purple patch just before we went on our run of 6 straight. It's not just problems with his confidence and mental fortitude, he's got significant technical issues in his game that should have been rooted out at a much lower level than the Championship.
Contrast that with Johanson's performance in the same game. Yes Pears makes the odd decent stop and even a string of them from time to time. Can we imagine him pulling off anything like the sublime save at 1:17? I'll forgive the odd moment from a keeper if he can make saves like that. Swap keepers and we get 3 points there, no doubt about it in my mind.
He's gotta be replaced. And a few steady games from this point won't change that.