These features are all included in the 21 June 2017 release now available on NITRC. The specific changes for your situation:
 1.) When you save or copy MOSAIC images, the image resolution is based on the voxel size of your images, not the resolution of your screen. Therefore, BMPZOOM=1 has precisely the dimensions of your background image whil BMPZOOM=2 double it. This reduces blurring common with non-integer scaling.
 2.) BMPZOOM and SHARPEN functions added to the scripting language. In the past you could only choose BMPZOOM through the GUI Preferences panel and SHARPEN with the View/Sharpen menu item. The sharpen command can increase the definition of edges (it is an unsharp mask), at the cost of increasing noise.
 3.) For MacOS users, images now use Retina settings by default (go to Preferences to switch this off).