Season 3 made me skeptical at first since I didn't want to see a fascist perspective. But their dehumanizing of "nulls" was always treated as bad so I don't mind so much.
I liked how they used hazel to show how Simon and Grace are ideologically different.
Grace sees humans as superior, while Simon simply hates nulls. One will kill to maintain "order" the other bends the rules to make people happy.
Hazel as null was well used if predictable.

Wait wtf hazel has alrick's memories? I mean it makes sense but wow.

Shit I saw the ending and I am kinda sad now damnit. At least hazel is ok that is all that matters. Hopefully she can help heal Amelia too.