Over all I have to agree with you, and it pains me to say that because I've played her every day since season 14. But she is op.
Not sure I can scan anyone without a line of sight, unless that change happened without me knowing it, and without me noticing it since. I will say that using her missiles while diving is an art. It's very hard to time it in such a way that the stun will still be in effect after you've hit the ground and raised your weapon. You can use it more easily to aid your teammates, but that's probably something you only see in higher skill lobbies. I never see anyone using her effectively on the left side of the curve.
All in all, there was a time even just two seasons ago when I would have said she needs a nerf. Now, with the advent of Axle and the speed-is-everything meta, I'm wondering if she isn't exactly where she ought to be. Maybe it's all the non-mobility legends that need a catch up.