Scouts are already quite useful: They can be used for rushes and they warn you if enemy units are close. Can't expect more for 250 common.
Not to mention that changing scouts would change the gameplay for no good reason. I still think that changes in functionality of units or structures should be limited to what is needed for better balance. If you want better scouts, take that idea for a sequel. Outpost 2 shall stay Outpost 2.