Might be the fact that I fancy him a bit clouding my judgement, but I liked Quinlan. He reminded me of Rob Burrow and I don't think we ever saw the best of him.
Despite the lies the club came out with when he signed, he was clearly pretty badly injured in that game for the Magpies (Or whoever it was). He came over with more padding than Nick Fozzard on his thigh and he was never fully fit for us. If you look at him on youtube, he was like a young Rob Burrow, as spritely as it's possible to get. He was limping through his stay with us.
He is a modern fullback and a good one at that. He's prone to being stepped one on one, but lets face it, he's replaced Paul Wellens and he was absolutely appalling in every aspect of the game towards the end. Lomax is done, no point even bringing him back at all. SMD is probably in the same boat.
I'd presume if they prove me correct, Adam will be back over ala SMD.