Also, I suggested this idea a very long time ago and found that it overly complicates play for the turrets. I think the problems isn't turrets, it's that the turret is as strong as the B-Wing attack. That is atypical; if turrets were always that awesome, why not equip every ship with a turret?? The proclaimed cost factor built into the turret ships (point cost) is simply not enough.
Because star wars space battles were based on ww2 dog fighting and not every plane had a turret back then either.