In some cases this might help. Yet the issue for me is that it gets in the way so often, acting more in favor of the enemy team than yours. Especially for team mates that might not know that a smoke will pop out. You might be shooting someone with a good sight on them and BOOM, smoke. Now you don't know where they are, you barely know where the walls in the house are, you get stuck on a tiny ledge and hello grenades...
I get that the point of the skill is to block vision, that is it's core thing, and to not be OP it needs to go both ways. It is just a skill that has the potential to be extremely annoying. I've thought about things like:
If one person sees an enemy they relay the info - but that is kind of like scans.
You get spacial scans, like the walls and stuff show up (you see the terrain in something like night vision) - Also scan like..
Allies get an armor buff, like they become fortified - it doesn't really make sense.
You can heal/ regen shields faster in the smoke - if enemies could do the same I'm not sure it would help, probably(?) as they likely have more health/shields if you resort to smoking yourself. Even if an enemy heals up, the attack might temporarily slow down. Still amounts to rather little.
To make up for losing vision, the smoke heals you a little if in the smoke on impact - not technically a support legend.
Ult and tactical charge faster in smoke - doesn't really make sense.
Ult and tactical does NOT charge in smoke - if it only affected enemies it would be a little bit useful, both - same kind of greifing skill it already is, just more...
In short, I don't quite know what to do with her, but I don't like the state that her tactical is in.