I was one of the beta testers for 6.6.0.2, and it is considerably faster for the downloads to the USB sticks, at least using USB 3.1 sticks.
One other "feature" of the new software also comes with a bug that has not yet been fixed. For Dynon users, the program will automatically download the latest Dynon obstacle/nav database and put it on the USB as well, with your SA charts. The "bug" part is that cycle after cycle, the program does not delete the OLDER dynon obstacle/nav database on your computers C: drive where the SA data is stored. Over time those files can add up and take up space. Note that you still need to update the dynon obstacle/nav database on your screen the same way, using the Setup menu - it's just that SA now automatically pulls it and places it on the USB for you, instead of you having to go to Dynons website and download it.
Other than that, yes I think 6.6.0.2 is better. Not what I would call good yet, but it's definitely progress. The user interface is still a kludge but we're headed the right direction.