RE: See fletchings at impact....HONESTLY
Not to me, TFOX....lol (makes sense)...
If you shoot 20 yds......from 20' up......don't you eliminate MUCH of the "arch"?
Reason I say this is......if your goal is to have your BH replace the spot on the deer wher eyour pin is (in this instance......your 20yd pin)......would the arrow correct itself and be pointing straight away from you on THIS shot.
I have NO problems seeing my arrows in flight on 20 and 30yd horizontal shots. Put me in an elevated perch, though.....and I find it .....well.....I don't find it.