The ONLY reason not to use HW...if absolutely necessary...would be his health. Burning a redshirt year pales in comparison to possibly winning a tournament game. The only question in my mind is whether or not HW or Autry were to be the 7th G option. 7th? Yep. Battle, Buddy, Carey, Hughes, Dolezaj, Brissette. If it came to it I could see Dolezaj, Brissette, Chukwu, Sidibe, Braswell play without Autry or HW.
Personally speaking I would burn HW only if all 4 of the 1st 4 guys were out. As long as one of them is in I could absolutely see Dolezaj and even Brissette at G before HW or Autry. Game situation when this is necessary will also play a part. Its a different decision up big or down big and also 20 minutes or 5 minutes left. What if...the game went 6 OT? Nah, that could never happen. 95% sure that HW will enjoy his seat the rest of this season. He can battle for 4th or 5th G next season.