There seems to be a few players who fall into that category eg Abeid, Bigi, MYM, where the belief seems to be that they'd become better players under a better manager. As I say, that seems to be based on hope rather than any evidence on the field.
I'd gladly see Taylor replaced as well. However, I think after the Everton debacle, Pardew's faith in MYM was severely shaken, because the player wasn't just bad, he was completely hopeless. You can bank on Taylor producing some kind of performance, even if his style of defending isn't very imposing on the opposition.
Colo was hopeless in the Everton game too (a few other matches as well) yet Pardew's faith in him hasn't shaken
Typical shite management from Pardew, once he decides your crap, there is no way back even though there is clearly talent/ability there