The pianoworld layout is excellent actually - for a forum. It just needs an upgrade - while preserving the convenient list and paging format, which had been purposely chosen and designed for convenience - less scrolling etc. And also needs to have any intrusive advertisement activity removed. It's ok to have ads - but they need to first do adequate testing to ensure it's not fully in-the-face kind of advertising that create issues with many users.
Upgrades would need to be along the lines of more direct file (pic and or music) upload. pianoworld doesn't even support music upload. Flarum sites do, but PT probably doesn't have it set up, or probably has been configured to not have it.
Also, pianoworld not only has a clunky out-dated way of uploading and presenting of pics .... but also has an out-dated system that actually modifies your uploaded image by either making the screen size smaller, or further compresses your image, so whatever image is uploaded eg. 500 kbyte image will turn out to be something small, like 60 to 100 kbyte at the end (after upload) - with significantly reduced quality.