Huge first turn advantage on foundry. Basically unbeatable.

[SC-FTW]

There would still be FTA, especially on smaller maps. P1 can grab the wit space and scout in 3 wits. P2 will still have to use at least 2 wits to notice and take down the scout, and in the meantime P1 is gathering useful information. P1 could also produce a soldier ahead of P2 instead of scouting.

On large maps this can cause problems as well.

P1:
Wit space grabbing (2 wits gone)
Now either save/spawn a runner.

P2:
Wit space grabbing (2 wits gone)
Spawn a runner or soldier and scout/build up defences/start rush.

So now P2 has an advantage over P1.