I agree with most things said here.
CC screen is a bit random for us on a laptop. Doesn't appear to be ordered at all, so it's a tad confusing. Maybe colour codes? E.g. red have completed runs, green are on course, blue are staged/queued.
CQ is the best screen IMO. Works great, easy to understand, almost perfect. A separation between staged/queued cars and cars on course would be nice. Could be as easy as a heavy line dividing them.
TK could use a bit of work. My current pet peve is that the order (top to bottom) is backwards of CQ. So if they are side by side, it's a bit confusing. Also would be great to separate the drivers when they are on course vs staged/queued. Right now TK does a good job of bumping a card from on course to finished, it would be nice to see a similar thing done for a car going from staged/queued to being on course.
Lastly, this might not be necessary, but could Chrono mode be integrated into one of the other 3 screens mentioned above (CC, CQ, or TK)? We use Chrono mode obviously to keep track of cars on course and ensure there are no false trips, but it has no functionality. Would be nice if TK had a running timer for cars on course, effectively combining chrono with TK and also solving the problem I mentioned above because you would know which cars are on course that way. Just a thought.
Not related to timing, but someone mentioned being able to go previous/next driver for registration purposes. I would love that! We have to edit classes or car numbers sometimes, and it would be great to not have to go back to the full list each time.