Instead of listing random characters, let me attempt to rationalize what I perceive to be the current top tier meta of the game
People underestimate the dramatic changes to chip damage reduction and meter building on normal attacks, which is why I currently believe the top tier meta has shifted from safe pressure (i.e., pre-patch A-List Johnny Cage, Crystalline Tremor, Kobu Jutsu Tanya, Tempest Kung Lao, etc.) to safe 50/50 mix ups (i.e., contemporary Cutthroat Kano, Demolition Sonya, Ronin Takeda, Swarm Queen D'Vorah, etc.). I am in no way, shape, or form suggesting that the "safe pressure" characters are bad, but their normal attacks almost do twice as less chip damage as before while simultaneously building less meter. In contrast, a character like Cutthroat Kano has safe 50/50 mix up that can result in advantage with one bar or 50% combos with two bars anywhere on the screen. D'Vorah shares similar characteristics but requires more execution. I am not certain that a "pressure character" is able to generate adequate offense to compete with the safe 50/50 mix ups and the reward they provide.
As far as Mileena is concerned, she has strong footsies and zoning but unsafe mix ups, which is a description of something that has never been top 5 in any version of this game. You still need absurd offense to be a really strong character.