The only physical change from one degree weaker loft would be the 1 extra degree of bounce- may be some minor change in turf interaction. I do see sites having +/- 1 - 2 degree custom loft options so assume Titleist are filling custom loft orders without issue. In any event I would recommend any bending be done by Titleist to maintain warranty and to ensure it is done correctly.

I can't say it any better than what Joseph M stated. Total agreement here.