I know alot of people have extreamly strong feelings about her, you either hate her or love her and both sides are very loud about their opinion. But it is kinda weird that one of the main faces of the game is missing, some may argue that mileena IS the main face of mk females. Sonya was obviusly the first one but both mileena and kitana are way more iconic.
I think most people view mileena/kitana as the chun lis of the mk universe but the difference is that SF would never ever leave chun li out of their games, so i dont get why mileena is missing.
Mk feels weird without her face in it.