This idea only applies to burrowed or invisible units.
Instead of scans automatically detecting burrowed units or cloaked units they should INSTEAD show that red alet dot/symbol that is shown when you have a radar and it detects units in the fog of war.
Since the dawn of sc2 burrow play has sucked because terran is not forced to make detection like ravens instead they just have an instant solution via scans.
This change would acomplish only 1 thing. It would allow the unit to still be unknown to terran.
So before the terrans start crying understand that this would still allow you to shoot the unit.
This simply would allow the unit to not be identified.