After a month, I still don't really particularly like any of the new characters. Erron Black is alright. Cassie is ok, but nowhere near as likeable as her parents. Kotal Kahn would've been cooler if he wasn't such a doofus in story mode. But I guess those are the ones that are allowed to return.
D'Vorah, would normally be a character I'd love, but I just don't, I would even say I dislike her, my ears hurt every time she opens her mouth, and her attitude and motives don't suit me. Ferra/Torr was a cool idea, but nah. Jacqui, doesn't stand out. Kung Jin, meh. And last, and definitely least, Takeda, he's annoying "A challenge would be nice!".