Baraka: If ex blade charge stun like Freddy's ex ground claw, and gives a full combo and he'd be broken tier lmfao. In all honesty if he had faster normals he would be perfectly fine as is. Maybe just give ex blade charge invincibility.
Ermac: Ex teleport has faster startup, follows through with second hit on block like reptiles ex dash, and is slightly + frames or 0 frames as well. Or Armor on ex lift.
Mileena: Needs an armor move other than x-ray. That or a damage buff.
Scorpion: Better pokes. Or make ex spear armor more reliable and not so negative on block.
CBSZ: Dive kick follows through like Sonya's into full combo? LMFAO daaaaayyyuuuumm. godlike
Quan Chi: Speed up some normals.
Sektor: Armor.
Kitana: ex pretty kick should have armor. Not lead to a full combo, but have considerable stun on hit, and be slightly +frames on block.
Jade: Faster recovery and startup on projectiles. Or a damage buff.
Sub-Zero: Give him his damage back.
Noob Saibot: Given a true launcher for combos.
Nightwolf: F3 a low starter.
Not saying any of these should of really happened lol, just answering the question. Although I do thing some of the things for some of the lower tiers are good ideas, Ermacs teleport buff is a good idea IMO.