Imma play devils's advocate here and say that, as a GM, I love this, because it means players are coordinating and thinking tactically, which I like to reward in my games. I would add in some house rules to handle this, but it would involve a few steps. First they would need to create an AR overlay for the image link so they could see it while still having some sort of access to their own sights or smartlink. I look at this as a not-difficult but not-basic computer check (skill level of a tech hobbyist, maybe threshold 2). Then I would call for a logic + intuition check from the sniper with a variable threshold to see whether they can pinpoint the target that way, which could reduce the blind fire penalty to -4 on a succesd, and if a player really wanted to make this one of their characyer's shticks, I woukd create a 5 point quality for them that further reduces the blind fire penalty to -2 on a success.
The way I look at this, the tram has to succeed on 2 other checks before the attack roll is even made, and the attack still comes with a minor penalty, AND you have to contend with a potentially very high barrier rating. It opens up new angles when they coordinate and plan, but there is no guarantee that a mark is going to be in a room or hallway near the building's edge (I wouldn't allow any personal weapon to penetrate deeper than that, even a Barret with APDS rounds), but this could also lead to interesting runs where the party needs to find a way tp lure a fortified target out to a better spot in the building.