Your #2 faction doesn't have to control a station to protect you. The only advantage to leaving another faction with an asset is to protect the mission board in the event of a Lockdown, but even Lockdown isn't that damaging of a state as Universal Cartographics is s available and it's usually short lived.
There is only one time lockdown really hurts and it only affects factions that don't control a station or exist in another system and the system controller owns all the stations and goes into lockdown. That pretty much leaves you with no BGS options.