Looking at the players who have left us in recent years :

McCormack, hasn't had a regular place or improved form since going.
Cook , not included in the match day squad at struggling Bournemouth.
Byram, unused sub for struggling West Ham.
Taylor, unused sub for basement battlers Burnley.

I understand the reasons for Wood leaving but hate the modern way footballers ( advised by agents no doubt ) refuse to play for the club who are paying their wages. He will find goals harder to come by when facing Premier League defenders. It will be interesting to watch.