Importing routes to the phone does NOT require a connected bike. You can do the whole thing with just the phone. Near as I can tell, the phone does it all and the bike's TFT is just an alternate display. (Always find it funny when I tell the phone to "Go" on a route then it tells me to connect a motorcycle -- as if were merely a dongle.)
The only beyond-words-frustrating irritation is the audible turn-by-turn directions. Sometimes they play, sometimes they don't. Can't find a setting on the bike or phone that reliably works. They come and go randomly. I'll turn they bike off trying to get them. Never seems to work. Then a gas stop (with bathroom break) gets them going. Or stops them if they were going. And sometimes puts them to the speakers rather than my headset. Only reliable indicator is the words "RADIO OFF" on the bottom of the display always mean the directions are off. (Not that tbey are on when the words are not displayed. Random.) Know my firmware is behind. Only 1,500 miles from a service interval so waiting seems practical.