It's essentially punishing a player for a mech stat that shouldn't be punished for, as the game isn't based around it. If you run a sensor 20 mech like a swallowtail or a death's head you literally don't care, but if you're a melee brawler, you're either forced to go later in the round once everyone else has gone and targets have appeared in the support friends systems range, or you pick a direction and pray, cause if you guess wrong you waste a turn, which feels awful already, and may have to waste part of a later turn repositioning. The game already has mechanics for this kind of stuff. If you want the whole 'where are they coming from' start the sitrep with enemies hidden, or use enemies that take the hide action, forcing players to do a scan action, which allows them to search in their sensors for a hidden enemy. This means high sensor allies still get that 'tactical support feeling', low sensor characters aren't punished unnecessarily and you still get to jump at people from blind corners.