I don't know, but I do think it's very much in keeping with Shen Wei's characterization throughout. So it's character consistent, which is the important thing, and I do like me a flaw, if you think it is one.

I've generally seen SW's consistent decisions to act on his own as objectionable but not *bad* for the show. I'm in favor of him learning to trust ZYL and work with him. It's just something I'll have to struggle with in the fic. :D

I may have clearer feelings on this after my rewatch.