That's how I usually start the game with Dash if the enemy's deployed in the opposite corner, he can be in the enemy deployment zone by turn 2.
As far as immersion, the large ships being faster than the snubfighters never bothered me, they're larger with therefore larger and more powerful engines. And besides, a large ship can't outspeed an A-Wing or Interceptor without an Engine Upgrade. And the Phantom is just cheating by getting a head start with it's cloaking device.

