It's really hard to judge Curtis. He had a good reputation at WBA but basically had barely played any PL football - we paid for his potential and the odd link to Arsenal helped drive the price up. He had a bad start, then he settled down, then he snapped his Achilles tendon (at Arsenal), then, when he returned to the side, he looked great for six months alongside Laursen.
I suppose you could say most defenders would look good against Laursen. Then Laursen was out, and Davies looked rocky... then his shoulder problems started, and then... well, that was about it.
So, I really don't know how this is going to go. He could be great at Birmingham, or awful, and better suited to the Championship. The fact that O'Neill last season didn't pick him, then KMac largely overlooked him, and now GH is prepared to sell him without even giving him one game under him, suggests he's not that good after all.
Really interested to see how he does at Blues.