Since ClickUp seems to be all-encompassing product for teams, the only thing missing for me is a more robust notes feature.
Perhaps a "Knowledge base" you could create for your team. Many of us have how-tos or technical steps or other knowledge to share among team members. Perhaps some on-boarding info or some workarounds.
I'd love to see a searchable notes feature with a little more robustness than the current quick notes. Not sure if this is something a lot of people would be interested in, but OneNote is just clunky, Evernote is expensive, and I'd love to not have to go outside of ClickUp to document our team processes! :)