Say current ladies SP requires an axel. 2Ax or 3Ax as there is no 4Ax ever landed.
Let allow either 2Ax or 3Ax or above.
Sasha cannot do Axel but she has a stable 4T. She could benefit much.
I'm sure that when people decided to train a 3A instead of a 4T, for instance, it was done keeping in mind the rule of allowing 3As in the short but not 4Ts. You can argue that changing the rules to allow quads in the short is unfair to those who trained 3As. And I would say there are more women training 3As than there are training quads.
Kihira, Tuktamysheva, You, Sakamoto, Higuchi, Tursynbaeva, Kostornaia, Yokoi, Hosoda, Miyahara in seniors
vs
Trusova, Scherbakova, Tursynbaeva, Medvedeva, Zagitova (possibly), Kihira, Hosoda (possibly)
Current skaters using a 3A:
Kihira, Tuktamysheva, You
Current skaters using a quad:
Trusova, Scherbakova, Tursynbaeva
Please add to this list if you can think of any other seniors. The numbers don't actually favour the quad jumpers all that much, if at all. It's not the fault of the 3A jumpers that the 4-jumpers decided to not learn a 3A.
Suppose one year, the flip was the compulsory solo jump for juniors. Is it then suddenly unfair for any junior skater that only knows flip combinations?