I thought he was good. Coached the club to a better record than Tippett ever had, and won three playoff series (the most since 2006 by any coach).
As you can see on this thread, Oiler fans on this forum are weird and care more about coaches' demeanor and post-game quotations than about results. Woodcroft was a bit of a windbag in his pressers, but who cares? The club won a lot of games under him and seemed to like him.
The only thing that suffered a bit under Woodcroft was team defence (for all of 15 games) when the genius organization decided to force a particular defensive system on the club, going against the grain of the coaching staff. This, combined with injuries to the club's best forward and defencenan, got Woodcroft fired.