Alright, I've used opera GX for a while now and I love everything about it but of course, there will be stuff that could be made better, nothing is perfect!

Here are the Quality of life changes that could be made:
Make the sidebar toggleable with a keybinding or digital button.
The social media integration on the sidebar is good but needs changes like being able to pop up another window on the screen that can be docked like unity's system and be rescaled, This is due to the sidebar blocking like mostly all view of the page you're on when the social media is on.