Upgrade of the graphics engine would be good, but I would like to keep the possibility to utilize large screen resolutions. Setting the game resolution in RA2/YR to 2560x1440 lets me see the battlefield as a commander should see it, from high above. I don't need to zoom in on single units (as has been possible in newer games), and the camera angle should be fixed (as in the classics). That lets me focus on the battle rather than the camera controls. I have been hooked on all these games from Dune 2 to RA2/YR but I have never missed the opportunity to zoom in, only the opportunity to zoom out.
