Just wanted to start off by saying that this app is absolutely amazing and love the pace at which it is being updated.
I'd also like to help by requesting a feature that I think would make the AMOLED appearance look better. Similar to the default dark mode, it would be nice if the AMOLED dark mode had the same card like rounded borders. That would make it much easier to see the separation between each post. The bottom navigation should also be darker I would think or allow for auto-hiding it when scrolling.
In addition to that, I think the green colour that's being used for upvotes should also be much more vibrant. It becomes a little difficult to tell it apart from the normal white colour especially since I'm colour blind :)