GitLab team member here, thanks for your feedback.
This blog post about the future of the Web IDE [0] provides insights on the evaluation and plans, published in May 2022. The remote development direction page [1] dives into all plans, challenges, etc. and also links engineering and product resources (issues, epics) to subscribe to. I'd suggest commenting on the epic with thoughts and ideas [2] - thanks!
[0] https://about.gitlab.com/blog/2022/05/23/the-future-of-the-g...
[1] https://about.gitlab.com/direction/create/editor/remote_deve...