If people lose consistently to players using F3, they're doing something wrong.
Not that I care for DA lake, but I can imagine, the F3 view can change dynamics of the fight quite a lot.
In DA you got guys flying Tempests and other ungodly birds and only pick when safe. They're hovering 4-5k above anybody else. They don't have to maneuver to see if somebody is on their low six or climbing to them from bellow. It's nearly impossible even for a team of 2 or 3 to come into gun range, since F3 works as early warning system. It makes even the worst stick pretty much untouchable from anybody with a lesser bird.
If I'm right, then it's good to get rid of F3 view.
If I'm wrong, then it's no need to have F3 view enabled.