Yup, GitLab features are actually fairly good (much better than GitHub IMHO). By far the biggest thing I would ask for is polish. Flesh out existing features, fix bugs, improve UX flows and improve performance.
Bug fixes, UX improvements and performance improvements are added to the monthly release blog post, for example GitLab 15.11 [1] - in case you want to follow these updates more closely.
[0] https://about.gitlab.com/direction/#fiscal-year-guiding-prin...
[1] https://about.gitlab.com/releases/2023/04/22/gitlab-15-11-re...