Joe, thank you for the suggestions! We do take user suggestions very seriously. The ideas you are suggesting are feasible to implement.
FYI, we already do support importing from KML and GPZ. But not yet exporting to other formats.
Additionally, v10, which is on the verge of release implements "cloud sharing" of all flight plans amongst all of your registered iFly devices, such that you could create your flight plan on Windows (as v10 runs on a PC!), and then sync your flight plans from that PC to the rest of your devices.