After chatting w/ our forum folks, it is definitely in the backlog. They are working on mobile improvements/tweaks at the moment, and we hope to be able to offer a darker color scheme option as well as other UX tweaks after that is complete.
There are a few changes that were made to these forums that make the dark scheme a bit more work than it probably seems like it should be, so don’t want to give a specific ETA. They are in the plans though!
Keep the forum improvement suggestions coming please! =)