Finally got around to doing a Diable playthrough, so here's some feedback.
As Diable is neutral to pirates, they're a lot harder to gain rep with than other factions, as you don't get faction rep just from doing regular bounties. After I picked up the commission, I found myself sitting in Corvus with my transponder off, grinding reputation off of hapless Hegemony patrols to get access to the higher-tier ships. I don't think this is a good thing.
The Gust is a really good ship. It has performed far better than I expected it would from looking at the stats. There's a lot of things making it more survivable and harder-hitting than it's numbers might suggest; the ship system Wanzers have a good energy weapon and PD that work even when you're overloaded, it's small and narrow so it can avoid a lot of damage other cruisers would have to absorb, and the built-in Heavy TPC hits hard enough to break through cruiser grade armor. (Why does it do 5 EMP damage? Seems pointless.) Of course, being narrow means that a bad hit to one side can take out the armor on both sides of the ship, and the AWACs can be destroyed if you're careless, so it's not all upside.
That guy complaining about how Diable needed Safety Overrides because all the weapons are short range and flux inefficient has obviously never seen a Recson. And it's not like vanilla weaponry stops existing when you take a Diable commission; you can actually put HVDs and Heavy Maulers on the Haze. Amazing, I know. You really shouldn't be able to do that. You know what else you shouldn't be able to do? Mount a HIL on a Maelstrom.
The Blizzaia is hard to tell apart from the other Wanzers. They're all hard to tell apart, but it's not much of an issue outside of the Blizzaia because none of the other Wanzers is a bomber. Bombers need to be visually distinct enough that you can identify them near-instantly at the maximum zoom level while they're surrounded by other fighters; Blizzaias are slightly differentiated, but not nearly enough. Diable colours are white and crimson, so I'd paint Blizzaias really bright white so they contrast with the dull crimson of the other Wanzers. This would also make the red Banish torpedoes stand out more against the sprite, making it easier to tell if the Blizzaia has fired its payload or not.
I'm pretty sure the Pandemonium should be more logistically demanding than it is. It's an excessive, unnecessary, enormous ship, with more OP than even the Paragon. I'd say it's worth around 55-60 supply/month, or 13-15 fuel/ly, something like that.
The animations are great, the sprites are great, the art design is great. I like how certain design elements keep showing up on the ships; the forward spike, the triangular armor plates, the rearward sensor antennae, etc. They help give the Diable fleet a unified aesthetic theme.