I think Taylor is just fine in coverage. Doesn't mean he's going to stop EVERYTHING. Sure, he's going to get beat, but he's incredibly fast and agile for a guy his size. He was ALL over the field yesterday.
As stated by Future585, his biggest problem is that he's a moron. I'm a life long Skin fan, but there's no denying that.
I find it tough having a guy like him on the team. He makes so many plays that you want to like him, but he's such a jerk and such a troublemaker that I find it difficult to cheer him on.
It's a shame he can't take a cue from ... oh ... say maybe the late Walter Payton. It is possible to be immensely talented and not be an idiot.