I agree about the Leicester match. I thought he defended well overall and did a good job with the ball as well (one lazy pass aside).
I don't know if I "blame” him for yesterday. Maybe it's me projecting my opinions on Allardyce and team selections onto the situation, but I thought most of his issues against Arsenal stemmed from looking really uncomfortable in a back three. Sure, there are basic things he should have done better but confidence within the system starts on the training ground and didn’t seem like he had that yesterday.
(Also... why not just pick Holgate, who's played well in that role before, if you have to play a back three?)