Hi Thomas,
I certainly appreciate the effort put in by developers to develop DT, so I avoid ever criticising their effort which is freely given. However, I do make suggestions for improvements. I try to put together a case for why this would benefit users. Then if the developers are convinced of the value of the change they might try and implement it. As an example, I suggested the ability to color balance an image based upon sampling skin tone. That suggestion started an unexpected and lively discussion about the various skin tones based on race. So I then suggested being able to color balance based upon sampling a color in one image and making it the target in another image. That suggestion went down better. Now in DT V4 we have the sort of feature I requested in the color calibration module (spot color mapping). The developer went further and put spot exposure mapping into the exposure module.
It would be worth outlining the benefits of using the second monitor and seeing if a developer is interested in your suggestion. BTW, as I said before, I use the film strip to process a days shoot and move from one image (unprocessed) to the next. Some images I rate as rejected to later be deleted and others I give a star rating. I am very happy with how the filmstrip lets me do this. Also sometimes I take a snapshot of one picture to compare to the others in order to find the best shot worth my effort of developing.
Good luck with DT.