When you wrote this, you were aware that you are running windows applications which were never planned to run on retina displays right?
Being a Linux user, I can't really confirm the problem on retina displays. That being said, I would believe that there aren't that many retina displays attached to windows computers, and therefore, not many softwares planned with such a display in mind. In other words, Crossover is not entirely responsible for how your application will look on your screen, the application being ran shares a significant part of responsibility regarding its own display.
So not only are you running software never planned for your OS, you are also running software on a display that wasn't planned for either. Although I'm sure Codeweaver is doing their best to procure you with the best experience, I would not be surprised such situations might escape their means. Since the software you are running is at least partly responsible, Codeweavers might not be able to solve every problems on the display.
This is not do the appologies for Codeweavers, but I'm thinking that you might not appreciate the complexity of the problem, notably MS Office. Since MS Office is obviously proprietary, Codeweavers possibly can't change certain behaviors which are inappropriate for a retina display on OSX. Things might stil work on Windows + bootcamp, but you are removing one difficulty, since Windows itself would be running the software. Just to drive the point home, I believe that even Windows needs an adendum so as to fully use a retina display.
That being said, if the problem persists across many softwares, I would still invite you to file a support ticket, as there might still be a solution.