The easiest part about being a sports fan is having the ability to use hindsight in passing judgment of how a team is managed. Poile gave Legwand the contract he did for two reasons: 1) the numbers were comparable with other players posting similar productive to what Legwand had in 06-07 while defensive play was also taken into account. 2) The team desperately needed signs of stability in order to have the best shot at signing/re-signing players going forward.
Obviously his production declined over the past three seasons, but it is absolutely reasonable to credit the role (and line) he was put into by Trotz for the lowest amount of points in a season during which he played 60+ games since 2001-2002. Now... let's continue this part of the discussion for weeks and months...
