So How Do Y'all Feel about the Extra Class Servants in Ordeal Calls

So what are everyone's thoughts on the Extra Class Servants in FGo's Ordeal Calls and the fact that so far they're getting their own equivalents to Grand Servants with things like Paravati, Edmond, and BB getting their evolved versions that really emphasize the aspects of that Extra Class that Chaldea needs to understand and who do y'all think they're gonna evolve next for the last one Ruler part of me wants to say Jeane since so far all if them have been some of the first ones they meet aside from Paravati (though I feel like an argument can be pushed that she's the first natural Alter Ego they meet) but anyway just wanted to ask this question and get others thoughts on the story so far