Simple proposal: Please change the level 175 aura to something significantly less conspicuous.
I don't mean to downplay the achievement of reaching 175 when I propose this, I legitimately find that blazing yellow aura blinding unlike the tame level 99 auras. I find both the character emitting the aura and especially stuff around the aura-emitter very hard to see, it is a hinderance and an eyesore. /aura does not accomodate this as the "mini" version of this yellow aura is still very excessively noticable.