If I remember correctly the PSG fans seemed to think he was a better midfielder than a defender. My not work out but could be worth a shot.
Yeah, I mean i haven't seen anywhere near enough of him to make a judgement, that works both ways. Could always give it a go. Personally I want Taylor back in the middle of defence so if Rozehnal going into midfield makes way for that then I'm all for giving it a go.
edit - That's basically what you said in your op.