It's actually already built into the new updater page that is on the iFly GPS App. This is being developed to work on the iFly 700 and 720. I agree, iFly Connect is super easy and the preferred update method.
Some people have a little bit of a hard time with the USB update method, but that is also a way to replace a file that doesn't show on the Connect list. Glad you got it replaced. Stay tuned.
Have a good evening.