GitHub clearly needs change of management. I havent seen much inmovation from them compared to GitLab. Microsoft is very strong on innovation since change of management.
I’m all for improvements, but I’m not even sure what I would want. At this point, I’m more worried any attempt at innovation would break the things I like about GitHub now, than I am excited for something new.
I use gitlab for all my private projects and don’t find it to be remarkably better in any way, and the UI always confuses me.
You can also open an issue directly in https://gitlab.com/gitlab-org/gitlab-ce/issues
The only reason for this is familiarity. GitHub is the market leader now and I use it every day at work. It's a lot easier to get used to a new UI if it is similar to the one you are used to. I'm sure if everyone used GitLab at work everyday, it would be fine. The UI doesn't strike me as bad, just very different.
Most features have a link to their respective documentation for more information.