Okay, I'm a little more on your page now. Ironically, it looks like we're at similar destinations, but take different roads to get there.
The main issue is, you want the option to be able to call out Elidibus for his role in the story prior to EW, and not have the WoL automatically predisposed to being amicable towards him. I can appreciate and understand that (despite being at odds with it, considering I want him to be permitted to be hostile here.) You also dislike that he's been stripped of his "Ascian phase", which I'm actually in full agreement with, but my own issues with it are a little different; I don't see it as his being "cleansed", per se, nor do I ultimately find him undeserving of sympathy or a better ending because of his past, so in that respect I don't agree. To me, Themis' involvement in the story as Elidibus is a different kettle of fish to the likes of Lahabrea and Emet-Selch, and consequently he shouldn't really be held under the same microscope that they are. From a story perspective, I think he got enough grief for his actions as we dealt with him in ShB, and that's kind of all been put to rest as far as I'm concerned. Lahabrea, on the other hand, was more "unfinished business" if you like, so addressing his role in our future felt appropriate.
As for the other Ancients, there are some things I'm on board with, others not so much; Venat was still let off really lightly in the narrative compared to the likes of the Ascians, and yes I'm going to swerve dangerously close to that argument by equating the two sides; Emet-Selch giving story exposition and really the only acknowledgement of her actions outside of the Mother Hydaelyn bubble (which he later goes on to praise) with the air of a grudge just doesn't compensate for the lack of comment that the scale of her deeds actually warranted. Azem doesn't receive much in the way of harsh criticism, but they are remarked to have been censured previously for their approach and numerous characters remark on the absolute chaos they wreak, tinged with both affection and exasperation, so to me it's reasonably balanced. Highlighting the keywardens in Pandae also feels a little mean, lol, since the poor guys like as not were just looking up to their superiors.
Emet-Selch in Elpis is enough of a misery to be walking evidence of his own flaws (as much as I'm fond of them), but... I don't disagree at all that some of his post-sundering actions don't get enough light thrown on them. I actually got into a debate a while back at how kindly the story suddenly takes to treating him, and the gymnastics they employ to avoid mentioning his hand in Garlemald in particular, so I'm with you there at least!