My experience is with bikes you can easily take one hand off the bike to signal a turn - what your traffic intention is. But with the scooters, it's not really possible to take your hands off the handlebars (you lose control!), and there is currently no blinker control to indicate your traffic intention. I wanted to take a left-turn on a scooter recently and this was an issue. I got honked-at.
I think they should add blinker light controls to the handlebars.