Hitting the age of peakdom doesn't result in all turds being polished. Using that logic, Shola should be playing like Drogba at the moment. After all, he's in the "peak" of his career.
The main problem with Taylor is that he hasn't improved in the slightest since breaking into the first team. It doesn't matter if he's 20 or 30, the fact that he's been at the club for yonks and still hasn't mastered the basics of defending is pretty worrying, especially since people on here slate our other defenders within one or two games of them signing for the club, without any really basis for doing so.
Defensive alarm bells:
Out of position constantly? Check.
Blames others for his mistakes? Check.
Complete lack of composure when in the eighteen yard box? Check.
Unable to command a defensive line? Check.
Completely one footed? Check.
Lack of pace? Check.
Failure to understand the offside trap? Check.
Exactly my problem with him.