I know it'll be shot down, but a serious argument for a reduction to B03 at the slams in earlier rounds (excluding SF and final in my opinion)
5 of the 25 completed 3R/4R/QF matches have ended in retirement.
Gasquet against Monfils, Garcia Lopez against Raonic, Goffin against Zeballos, Anderson against Cilic and now PCB against Nadal.
None on the womens side in 3R/4R/QF. (Not saying it's better quality, just saying that many men can't withstand back to back 5 set matches unlike the big 4. Really favours them in a way.