Well, people interested in working on the Executor aren't on the team, so it's not like it's taking away from the resources.
It's one of the few ships from OT not yet in FoTG.
Anyway, Esarai's Amaterasu has, IIRC, 164 turrets. If you equipped the SSD with a good coverage with large, long range main turbo batteries (perhaps Death Star-style), it could, perhaps, do with about 70-100 anti-ship turrets. Small AA turrets might be done as clusters single-part turrets, and if you gave it 100 clusters of 10 turrets, you'd have 1000 AA guns
in toto. I think that should do.
Especially if the turrets are equipped with powerful weapons, which would have to be the case. Huge anti-ship turrets would probably be concentrated in the "cityscape" part, so would most of the AA, while white armored parts could have much lower coverage, relying on fire from cityscape and the "side trench" of the ship, as well as the very fact they're armored.
Also note, the Executor's armament might not be as mighty as it's size implies. It definitely shouldn't be able to destroy Home One in a single salvo, because it definitely couldn't do that during BOE (otherwise it'd be one short battle, wouldn't it?
). Might have to do with it's stern guns not being able to reach it, but I think that near-inpenetrable armor should be just as important as an impressive array of weapons. In fact, that would be keeping with the "WWII in space" vibe of the SW. Naval battles should last quite a while, even if the odds are ridiculously skewed.