Features I'd like to see

It would be nice to see a slightly different cursor for the rotate tool, with the cross in the middle more visible and maybe alternating black and white line, so it will be better visible on light and dark ground (instead of a solid dark line something like this: _ _ _)

Since I work a lot with black and white, a channel mixer would be great too so it could be possible to have an output file that only needs small adjustments in Photoshop. While channels can be controlled, producing a monochrome file like this isn't very efficient.

I would also love to have a preference pane for tagging because going to a menu within a menu is not fast (More Tags) and it also doesn't allow for renaming a tag. I would like to specify which tag is being used by default for example if I want to use Approval Maybe it would be nice not to have to go into a nested menu every-time.

Since I use the percentage read-out in the info pane of Photoshop having the same in Capture One would be also nice.