MK9 had the best(most sexy, revealing, Sonya is a combat officer but she's dressed like a stripper) outfits especially on concept arts, but in-game models were too manly( same height as men, same limb length, broad shoulders, narrow hips ( easier to balance the hurtbox, important for a fighting game) Also MK9 had biggest TITS which is nice.
I generally disliked MKX art design it looked too comic for my taste, but women became more feminine (notable hips, smaller stature)Outfits changed to more modest, TiTtrate dropped dramatically.
MK11 continued with average healthy female bodies, but it had prettiest faces in the series, except for Sonya. Maybe it just me, but Cassie and Sindel instantly became my waifus. DLCs brought some sexy outfits back. Sindel raised titrate a bit.
MK1
No Cassie. Sindel looks like average asian chick indistinguishable from Li Mei.
Nyl has a lot of work to do.