If you go from 1% to 3% (or to 5% after AW) that's 300% more probable than before (or 500%) so THAT will be more noticeable than going from 30% to 32%, it's not even a 10% better chance
but since those are chances you want every little % you can stack, because with chances you can do thousands of runs and not get any drop at all, you still have 68% chances of failling at it dropping
Those are just random number to exemplify my point
TL;DR if initial % is low any extra % is noticeable, if initial % is high a small extra % won't be noticed