The electronic hardening is pointless; only Microwave beams deal electronic damage and the AI does not use them.
OK, next gen will be either without it or stay at this level only.
You probably don't need 3 separate designs. I'd probably scratch the Sunstone, or rerole the Sunstone as the close PD (with redesigned cheaper fire controls) and scratch the Sunstorm.
Yes, I got concerned that before I manage to build all those variants with my few shipyards I may be already higher in tech. I will combine Sunstone with Sunstorm.
If you look at the cost breakdown you'll note that you're paying A LOT for those top end fire controls, and the 10cm laser turret ships don't need em.
I noted the higher range but it seemed to me the higher accuracy at short range is worth the difference in price between mid and long range FC.
The auxiliary active sensor isn't very capable; an MCR of 195k with a move speed of 4kkms means a missile traveling 32kkms or more could hit you without being detected. It is not a priority, but personally I'd prefer a larger buffer on the MCR.
On the other hand, as I could not shoot further than those 192k km it seemed pointless to have bigger MCR than my gun range on those reserve ASs.
You are apparently not using your maximum fire control speed, is there any reason to that?
Previous generation of ships was using TS of 6k km/s so jump to 15k km/s seemed decent enough. That combined with space and price constraints led to picking this target speed.
What speed are the missiles you want to use them against? For your Sunstone to actually get off two shots in area defence mode, the enemy missiles have to be quite slow. And if you only get one shot anyway, you might as well switch to final fire and use smaller guns. I would also drop the second fire control on it, or replace on of them with a cheaper one. On a ship of that size, it is probably a lost course anyway when it sustains damage.
So far I got only few data about my foes. No idea how fast their ASMs are because both scouts didn't survive the first volley. But according to distance to enemies and time between the first and the second AMM volley those seemed to be around 40k km/s. With my current tech is 20k km/s max,still.
I think in the end I just need to build few decent ships that can survive few hits even from those ASMs, send them in and only then, once I get more data, I should care about matching my ships against stats of my neighbours.