Interesting though looking great as always!
The use of Mark 26, the 76mm, and a A-4 Buccaneer combo are very interesting, though plausible choices. Aren't A-4s getting a pit old by the 80s for a military as modern as Atlantia's.
Not really outdaded, they'd be the proposed Spey engined models (for at least some commonality with the Buccaneers) and would have received numerous updates to keep them current, they'd be quite new airframes too considering the production run of the A-4. The Buccaneers would be all weather strikers whereas the Skyhawks (at least at the time) would be general purpose attack aircraft.
I would suggest an 3rd STIR forward, and take an look in the belowdecks part for the Mk 26, as I am a bit doubted it will fit. if it fit's, you will be limited to an Mod 0 and MAYBE an mod 1
keep an eye on the fact that the turbines and boilers would be in separate compartiments on ship like this, so they might be a bit close together. also, the boilers would be higher in this ship, but would most likely be centerline types (well, this is possible, keeps her CoG low, but it wastes quite some space, something never good on carriers)
I would half the number of oto 76 myself.... but ok.
the ZW-06 has quite an prominent place for an navigational/surface search radar, but can't see directly forward. that mast should also be a tad bigger (with more supports for electronics, not taller or something)
the SPS-01 is an good bet for an ship like this, an tad outdated, but the dutch had nothing similar during those years. an alternative is the DA-08 and the LW-08 combo of the L-frigates (heemskerck class) which were likely to have roughly the same specs as the tromps, but unconfirmed on that
keep an good eye on displacement, as that gives you the fuel and stores you can carry, and the speed, as that gives which operations you can do.
1: Gotya, the Mk26 is indeed a Mod 1 which is quite a snug fit indeed, the thing fits into it's allotted space but only just I'm not sure whether a Mod 0 would be better or even a Mk13? I'd prefer to keep the twin arm setup if possible to get missiles in the air quickly.
2: As far as I can ascertain the layout I've chosen hasn't had too much of a knock on effect thus far
3: Wider with more platforms for various systems, got ya. With regards to the ZW-06 what about shuffling it around to be incorporated with a DA/LW setup?
4: I would probably prefer to go down the DA/LW route (see above point)
5: My calculations give me roughly 69,7 standard 76,9 normal and 82,6 loaded, that's incorporating an estimated weight of the aircraft 500 tonnes of ordnance and roughly 11,000 tonnes of aviation fuel, speed wise I was gunning for a top end of 34 knots from 221.7MW installed power
Now to get on to making the changes, regards. Mark.