You can only call what's in front of you, if the Sky cameras replay all the mistakes 100 rimes then it shows the ref up completely. His bookings and fouls were more or less OK, but as has been said he was unsighted with the (clear) penalty and the offsides were almost uniformly wrong.
I wonder how the standard would be addressed if we had the proper cameras every week and not just the shonky IFollow feed?
Anyway a generous 5 from me, as I said he got loads wrong (not the Stevens incident though, offside aside, that was only a yellow).