Request a new feature, or support for a camera/lens that you would like to use in Capture One.
I would love to see a Color Balance tool similar to Photoshop in Capture One. I find it excellent for finalising colour grades as making tiny adjustments is easier with it. Colour wheels of course allow the same adjustments but with the sliders it is easier to add/reduce certain colour, and you can go from red to cyan with one slider while keeping your eyes on the image constantly and seeing the effects of your adjustments.