I think we should add large shields again.
There is some role overlap, but what is if we use the exterior ability for one version?
Or that this large shields only protect you against Berthas?
Make a strong shield recharge device :)
* 5 times as expensive in metal and active energy consumption.
* recharge 4 times faster
AND
(
* has exterior + double size
OR
* enable exterior on near shields, resize them to 1.5x and has no own shield - only link to them.
)