Unless the bubble shield is a far distance away from the ship, this isn't going to work. the 50m or so you'd have to maneuver under a bubble shield is not enough for fighters to be worthwhile. This would also make drones much less powerful, as one of their main bonuses is being able to overwhelm turrets with targets and then kill them.
i'd assume bubble shield would only be say 5, maybe ten blocks from the ship, but unless you build very streamlined ships, with partially concealed hangers and such, your ship is going to have plenty of room under that shield, most ships are a lot longer then wide... but they tend to follow a typical "plane" shape, with a narrow front/nose, and large wings further down.
since the shields would be generated at the front most point, plus 5-10, rear most point, side most points, and top and bottom most points...
with a "bubble" shape... there would be surprisingly large areas for fighters to get in.
although i'm not expecting it, i'd assume there would be a way to enlarge how far it generates (please be an effect like overdrive modules)
so that would mean a larger area, don't forget, skin shields may ALSO be present, but would use more area, hence more power, and less possible weapons and such... (they would be seperate)
since "skin" shields only cover their "vessel"/"entity", turrets would not be a part of the motherships shields...
so really, once your through their bubble, you have no hinderance other then the firing turrets...
i never said a cruiser HAD to have bubble shields, so until you fire, you won't know... they may a breacher, heavy skin shields with heavy weapons... or maybe they have almost no skin shield, but tons of bubble, meant to block fire for a bigger vessel...
i'm not trying to suggest an op protection, where nothing gets in, i'm trying to make a new way of handling fleet operations.
if dreadnoughts could risk less shield for heavier weapons... carrier ships may be able to field a few more strike craft...
until you saw the shield, you'd never know... a heavy hitting dreadnought would be a prime target for a few lucky fighters if it had less shields would it not?
since bubble shields collide, even friendly vessels could not be clever and "protect" eachother by passing it's shield "within" another.
but that does not stop a bubble shield ship from standing directly between an enemy, and a friend, absorbing shots while the heavy hitter fires straight through the friendly shield...
i can see a downside, vessels WITHIN the bubble, would be well within turrets easy picking range... all i can think of is to have some minor accuracy penalty for turrets... like for every 5000 shield, it drops a full percent of accuracy, (i forgot, is 5000 heaps? my ships are so big and shielded that it seems small to me... but gameplay wise, i'm not sure... i'm assuming thats a "decent" shield, take a few hits)
so if your vessel has incredible shields, it's turrets would be lucky to shoot a shop if within 50m...
okay, not THAT bad, but the basic idea is the point... if one in 3 shots hit within 50m, then we'd want it more like one in ten...