Nice and it shows just how bad diablo3 is, this is something that seem to effect many HDR games, yes they bring in some nice effects and general feel to graphics but it also makes everything grey.
Swap between normal and stronger on that darkd3 and you'll really see it (I say stronger as that setting seems to have the most contrast, hardcore just make everything a darker and slightly browner shade of grey, swap between hardcore and stronger and you'll notice dark colours don't change in tone, the lighter colours just get slightly darker which is a reduction in contrast)
As t dll injection, that's the problem and what I meant about the online nature making modding impossible
EDIT
s I don't think they are bunny ears, look like feathers