I hate jumping on to requests literally hours after you announce you're back, but I have one usability niggle that I rub up against fairly often and is the main day to day issue I have with the app right now.
Is it possible to have a setting for swiping left-to-right to act as the back button on any screen that isn't your home feed?
I often for example go onto my profile to check back to a thread I've commented in previously, but swiping left-to-right doesn't bring you back to your profile, all it does is switch tab in the background so when you hit the back button you end up at your Posts tab on your profile instead.
In general I can't reach the back button with my right thumb, so having this option would let me use the app one handed to a much larger extent, which would be very convenient.