I also couldn’t help but compare the two death scenes of the Outer Senshi. Pluto and Saturn each get a line about believing in themselves before disappearing, while Neptune and Uranus are showered with forgiveness throughout the ten minutes they spend slowly dying.
I really love Haruka and Michiru, but they are flawed to the high heavens. It is possible to have them be likable characters without dramatically romanticizing the negative things they’ve done. We see that Usagi is ready to assume the best from them, but this is coming from the girl who gave the Holy Grail to the enemy because she thought it might save Hotaru.
A few others had offered their theories that shift the blame off Uranus and Neptune slightly, each of which I’m willing to consider with equal weight until I have seen everything. However, I think it’s interesting that, while everyone else would rather have died, these two decided to take a gamble. They knew the risks, they paid the price. Their intentions were good, which leaves the answer to the question “What did they deserve?” unknown.