Constant disconnections...
I've played on the Xbox 360 and only stopped when I got my Xbox One and Defiance was not available on the new console. So I was pretty exited to see it coming to the Xbox One... and played since it was available.
However I am still to complete 1 gaming session (usually about 2 hours an evening during the week) that I'm not getting disconnected (dashboared) at least 2-3 times a night. I now don't do Arkfalls, Instances (or whatever they are called) or even story missions as I am constantly being kicked to the dashboard.
I'd love to play more but see no real reason to carry on!