Maybe its just me, but it took me longer than it should have to find the button in the header to create a new post. I would have thought it would be where I put it in the markup.
I also think it would speed things up if the new post button defaulted the room to the room you were in. For example if I am in this room (https://forum.elementor.com/hub-beta-testers-35) and I click “Create a New Post” it would default the room I am posting to to the Hub Beta Testers room.
Just some initial thoughts.