I forget to list the added 1 Agi, that being said, the HWK is still only a 2A ship. Green die start to be better investments then health at the 3+ range or alternatively with larger pools of health. Are you telling me you honestly wouldn't trade the 1 A on the HWK for 2 shields and a hull if they added a free unique modification that did so? Also that primary does matter when you're using a weapon with a limited range band, like you know, every single turret we have.
As for support that obviously only applies to the unique pilots. Palob has IMO one of the best HWK abilities, but is he worth 1/5 of your points to run naked? I'd say most would say no on that, so how much does it cost to kit him out and make him a decent fighter? Just giving him a TLT makes him cost a point over 1/4th your list at 26, he can now shoot, but that's a 4th of your list in a ship that flies like a brick and can die fairly easily in 1 or 2 rounds of combat. Do you give him a Cloaking device & Stygium to try and keep him alive? How much do you invest to try and use his ability?
That's the issue, the HWK is even worse then your average ship naked, after the tax of making it not completely useless in a fight it's less of a support ship and more of a poor mans fighter. You simply cannot have a ship taking a third of your points be completely useless in a fight. This even more evident on Scum HWKs that need to be in the thick of the fight to use their abilities. It lacks the health to survive, or the maneuverability to avoid damage in the first place. If it was cheaper this wouldn't be a issue as it would be less fire on my more important ships, but once again, once equipped a HWK takes up a significant portion of your list in a very fragile package with only decent firepower.
As for Serissu you want cheap spam for one of the same reason Xizor wants cheap spam, to increase your odds of actually being in range 1 of one of your ships. Yes you can activate Serissu for as many times as the the enemy attacks the affected ship, but that still requires you to be in range. Fenn is a ace, even with the title you're better off avoiding arcs entirely if you're able. If you tie Serissu to Fenns hip you're telegraphing your moves and making it harder to avoid arc. It's only a single green die reroll, it's not the almost guaranteed block that is Biggs. Not even close.