Anyone arguing Blind should be sold is overreacting (he's a very useful utility player who's competent in three different roles sometimes), but the idea that him being our best defender since he came here is somehow a vindication of his meddling defensive ability is laughable...since the only remote competition in that department is Smalling.
I like him, but the argument that these poor performances are one-off, occasional occurrences is laughable. It happens regularly...and it's always in big, important games where we're put under pressure, and he's up against a quick side, a quick player, or a strong player. That's the second time this season...he wasn't quite this bad against City, but had a certain culpability in their goals. I remember him making an error against Chelsea last season that cost us a goal. I remember him playing poorly in at least one CL game...and it could be more. That's about four or five off the top of my head...and, again, it's all big games in which we're put under pressure. Someone pointed out yesterday that he struggles when the ball is played in behind him and it's very accurate.
He's a very useful player who should be used as a more technical but less physical John O'Shea of sorts, since he's able to fill in the same positions. He should primarily be reserved for games against teams we'll control the game against though, and only played in bigger games if we don't have another option. He's not always awful, by any means, but these performances in this type of fixture are nothing new.