I don't get why you keep digging in your heels about how she is supposed to be doomed because of her offering to turn into a mindflayer. I honestly don't get it. She's simply one more option that you have. You can take it, you can leave it, or you can completely miss it if you don't even bring her with you. By your logic it would also mean that Gale has to explode on the Netherbrain, since he offers. But thats a choice you get to make, isnt it?
I get even less how giving her a happy ending would somehow "retcon" all of her character. You literally do not have to change any of the stuff that we already have, you only need to add on top of it.
As for the whole "but its expensive" stuff: Sure, it costs more.Doesn't mean they don't change anything. With Patch 4 they reanimated the scene where you meet Minthara for the first time, for example. That also costs money, and I didn't see anyone ask for that, specifically, either. They are not done adding things, yet. Does this mean they will give us what we want? Not necessarily. But I see no reason to be all doom and gloom about it.