I don't believe he's shite, I just don't believe he's good enough. I think the most effective full backs are ones that get up and down the pitch, providing overlaps for the wingers and being quick enough to get back and defend, like Valencia on his day. Obviously the top full backs are great at crossing, tackling, passing but fundementally, for me, they need to be able to do what I said above. Blind can't effectively, so his passing and interception stats aren't as important to me.Well you really sound reasonable...
He's defensively sound and the numbers back that up (makes significantly more interceptions per match than other 'top six' full backs) which is why he's highly rated, whether you value it or not (that's frankly irrelevant).
His passing is good too by the way, high completion rate and total forward passes comparable to most. Doesn't fit your picture at all.
I agree his crossing has been wank so far. I'll care more if it continues that way (traditionally his crossing is good). Also when Valencia is having similar problems on his side I'm not willing to pick on 'the left back' like that's the main problem. I think both full back positions deserve an upgrade for the future but that doesn't mean Valencia and Blind are shite.
I'd like to see Shaw play when fit, but if he's not up to it yet (still) then sure, I'd be alright with Blind. He's certainly better than Darmian. Maybe Rojo will get a few games there?