I'm also going to throw my (admittedly useless) opinion into the ring and say I'm a bit unsatisfied with where the Diktat is going. The rework kind of feels like the treatment an overpowered thing gets in a multiplayer game (i.e., wrecked to the point of uselessness, any long-time Team Fortress 2 players should know what I'm talking about)
I'd be much more in favor of the Diktat working the other way around, where the Lion Guard is elite. At the same time, the regular navy is mainly incompetent, underfunded, composed primarily of conscripts, and using old (or poorly maintained/equipped ships). Where the regular navy exists primarily to keep order and make sure the populace doesn't get too wild, while the Lion Guard exists to actually get stuff done. The best example I could think of this would be Sadam's Iraq, where the regular (conscript) army was absolutely massive, but was using the oldest stuff and (usually) performed extremely poorly or flat out surrendered to Coalition forces meanwhile Sadam's republican guard got the good stuff and formed the most potent and most capable fighting forces (but their equipment was still outdated compared to the coalition's equipment)
The Diktat would then be like most military dictatorships where the most significant danger is the military itself. The way that military dictators counter this is by having some sort of force to counteract the normal military (loyalty via the appointment of family/clan members, secret security (like the KGB or DGS), a smaller more elite army that directly answers to the dictator)
The "incompetent out of touch bodyguard with a competent army" (like the Praetorian Guard getting beaten by regular legionaries later on during the crisis of the third century) would really be better in line for the Hegemony (kinda), Persean League (formed by the stronger/more influential Persean League planets to exert force on less influential league members), or even the Luddic Church (religious inquisition/bodyguards to the Ludd-Pope).
I'm perfectly fine with Philip going senile while the state apparatus continues to function properly (for as long as it can, rather). But I question if the Diktat is going to "feel" intimidating after this update. Also, I got no idea why anyone would bother getting the Executor compared to the Pegasus, it seems like a pirate or luddic path thing but even pirate and luddic path stuff have upsides. The executor as it is seems like it will just instantly overflux. Its flux dissipation is 815 with 34 vents but produces 3210 flux with the loadout included in the blog post. Even Onslaughts would struggle to operate with horrid flux stats like that.
Also please keep in the built-in solar shielding for all the Diktat/Lion Guard stuff, it at least makes them somewhat desirable to seek out.