If performance isn't affected, then it's possible that Surfire won't be concerned with a hot spot that isn't completely round. If the hot spot is so bad that performance is affected, then it is highly likely that they will want to take care of the issue.
Two of my Surefire TIR lights are E2DL Ultras and when compared directly to Nichia 219s, or other lights with white tint, their tint is definitely green. Am I completely thrilled with all aspects of the light (including tint)? Nope. Am I going to call Surefire to complain that the tint isn't the lovely white of my LX2 or E2DL LED? Nope.
When used as intended, the tint imperfection isn't even noticeable, and the throw and durability provided more than offset any minor imperfections.
.....and that's a lot of $$ for a light that only puts out 90 lumens. I would personally choose an E1D LED Defender or EB1 Backup.