Satsuki is not going to die. No. That's not going to happen. Nobody but the episode 1 spy and Dr. Matoi have died in this show. Nobody's going to die in the next two episodes and I will hear no argument that says otherwise!
Yeah, I don't want it to happen either. But this show so far seems to think that people love Ryuko. And no matter how stupid she is, how many times she "loses" her way, she is the greatest protagonist ever.
So I could totally see them keeping her alive when all is said and done, and killing off Satsuki. Realistically, I think the show will end with a crowd pleaser, where everyone you like wins and lives (so a no stakes ending). Which is fine, as long as they make the ending really epic/stupid and over the top. They have to really commit to the absurdity of the show. As others said last week, it's too far in the show at this point to expect any consequences. So if they are going to do anything, it would be some random shit in the series finale. I'm just saying, given how the writers seems to be irking certain fans, it would just be fitting if they put Ryuko up on a pedestal in the finale and killed off everyone's favorite character instead.