Rever tier list might look like personal experience, but i can't help to feel kinda the same way, his picks are on point with a few things, each one of these characters dominates in one aspect of the game by itself.
Mileena can low profile mids, insane damage, very good projectile and tracking specials.
Scorpion has nearly an answer to everything, he only lacks but a good wakeup, but his neutral is just as dumb either in Ninjutsu or Hellfire, i'm sorry to scorp players, but flame aura is broke as fuck, his teleport is a very good tool as well.
Tanya is one of these characters who is buffed by the universal meta changes, besides i personally enjoy Dragon Naginata since it forces characters to chase her, which makes all matches stamina aggressive working on her favor due her mobility, great walkspeed, pogo threat etc etc, DN also doesn't care about random fullscreen strings, random d1s in between pressure, if low profiles or not, random NJPs or slides, has great ranges, even with the damage nerf she dominates in midscreen as well and she has a 50-50 with B32.
I know Sektor is just as good and he is on many ppl tiers list, same as dragon fire LK or flamefist, but the way i see this tier list, all character revert listed has a total domination of certain aspects of the game which seems to be crucial.