I agree out of all the legends she needs the least fixing. Everyone looks for the wraith trial. I don't know about you but I see that trail above all the skins in the game. It is the easiest to spot . 90% of the people are using her to avoid aan escape.
But you're not seeing is when you use that to help yourself get away. I'm the guy following that trail from across the map with my scope. Because here you're right you're going to heal yourself fix your Shields you're stopping and I got you dead to rights in my sights. no one should be able to follow you from across the map so easily. That is my one point here. The other point I'm trying to stay it doesn't do you any good to use a into the void when you can easily be tracked and found. So my suggestion was to only allow people extremely close to see the trail or only see 10 meters of the beginning and the ending of the trail. This allows her to change direction and get away a little bit better. So playing against her you'll have a direction but she still cannot tell where she's going and could run into another group. Plus there's the bloodhound even if she does all of this a group who has the bloodhound will find her . There is a counterbalance to this. By doing this she is given a chance to survive or like all the other legends she's going to have to keep running and not help the squad.
How many other legends when the squad gets wiped and there's two or three groups run away to leave you behind? To many . in my opinion is not overpowered you still have a bloodhound you still have people searching for her and once she fired she gives herself away most likely most scenarios it's one on two or three.
And yes we'll be a tactical advantage for her surprise attacks but again you should be able to see the last 10 feet or so of the void or make it overall fainter.