So the Vision has its ups and downs at first glance but I noticed some things
when you look through it you get a waving effect
during this point and only when the wave passes over an enemy will the be a BRIGHT RED until the wave gets passed them
at this point you can read them on a small scale
the farther they are the more phased they will be.
Also since they body is colored the same during vision most people will be spamming with the vision on rather than giving an attempt to head shot
by most I mean even the ones who wouldn’t usually miss fire
so given time people would use it to hold over a period of time in which case you have to be super close to really be seen on the instant
or
people use it in flashes but can only be efficient enough to get a guess at your location not your most recent actions