The only thing I've noticed since my previous post is that on the dark theme, the link in the nav for the forum area you are currently in is almost the same colour as the background:
Forums >> Forum Headquarters >>
Forum News and Announcements
The part I highlighted is what I'm referring to. I only noticed it was there because my cursor hovered over it while I was trying to figure out if there was a way anymore to just go back to the topic listing in a forum area while viewing a thread. Might have also already been mentioned by someone else so if it has then ignore me.