Hey just a little Theorycrafting here:
What do you guys think of Protoss having a Line of Sight ability? One that would shoot out from a building (lets say Nexus) and reveals the map in a line that eminates from that building.
Think Forst Archer chick from League of Legends.
Terran has their scanner sweeps for clutch detection & scouting. Maybe Toss can have one too. Of course the fact that it's a LoS style detection means that it would have to be aimed well.
How long the ability lingers would be subject to balancing, but i just don't like being so dependant on observers for scouting. You really are forced to make multiple ones for good map sight, which hinders your Robo tech. + the different angles you can get from Nexus (Nexi??) placements could get interesting. On top of that, scouting a building/tech path of a player would literally be "a shot in the dark"
And of course using it would stop your ability for chrono boosts, so it would have to be used well.