If they remove the attack speed scalar entirely, so 5x to 1x = 1/5 damage, it’s a 10.25 GR damage loss:
ln(1/5)/ln(1.17) = -10.25
I haven’t been on PTR yet, was busy yesterday. Will check it out this weekend. But from Cratic’s post on PTR feedback, sounds like it’s somwhere in the ballpark of 1/2 damage compared to live. Give or take.