Slaughtering the Yevarra for research.

I'm expecting it actually.

Apart from the ethical aspects, did nobody find it strange that they speculated the Yevara might be Remnant, meaning machines, because they are able survive under the ice without oxygen and food? The Angaran scientist has caught and conducted research on a lot of them, she should have noticed by now if they are organic or not. But no word on that, just a forced decision between medical benefits against animal protection. In addition to this imho a bit jarring ending the game delivers some background information that the Yevara are supposed to be somehow connected to the planet's weather conditions ("bring out the sun" or something along these lines).
Just speculation, but it seems to me the quest was originally planned out to take a very different course, likely something related to restoring Voeld's climate, but was cut short. They didn't want the entire material go to waste and made up a different ending, so they could keep most of it in the game. Add some ethical questions for flavor and we got what it is now.

I stopped the scientist. But if my Ryder knew then what I knew by the end of the game, I would have burst the Angara's bubbles and just told the scientist to continue

I honestly didn't put much thought into this since I see it as an Angaran issue and not something I should be focusing on. I mean I only have like 100k people counting on me to find them a home. Since it is an Angaran who is conducting the experiments and Jaal is to much of a coward to step up then I have no problem if she continues her work.