Another balance nitpick: the Sargasso is essentially a better, cheaper Condor--both have a maintenance cost of 8, but the Sargasso has a deployment cost of 8 rather than 10, and 1.45 fuel use rather than 2. Meanwhile, I think the Sargasso is far more dangerous: 80 OP vs. 45 is huge for fitting expensive drones and hull mods, and 70 vs. 45 top speed gives the Sargasso much greater tactical flexibility. The Sargasso is substantially more fragile, but I find that rarely matters for a carrier--neither is really suited for close engagement, and I think the Sargasso's superior speed and shield more than compensate.
I do not think the ship itself is OP (although 80 OP is a lot for a fast carrier)--I think it is no better than the Drover, and worse in several respects. However, its cost of 8 should put it in the bottom-tier of destroyers, and I think its capabilities put it near the top. I would argue for either bumping its costs up to ~11, severely reducing its capabilities (if leaving both fighter bays untouched, something like dropping it down to 40-50 OP and downgrading the medium mount), or some compromise between the two.