The club's two best spells when he was on our books came when he was out of the team, Roeder end of 05-06 season when he was at Villa on loan, and Keegan end of 07-08 season.
Yes, and some of the club's worst spells were also with him out of the team (Souness, and after his final transfer to Villa). No one has claimed he is Maradona; he doesn't transform a team.