finally got a chance myself to test the Gryphon for a bit, and i don't see what the problem is.
seems perfectly fine to me:
Spoiler
:3
Fair and balanced.
I played a bit more to see how end game scenarios goes. First i noticed a few "bugs".
The Onslaught have two "standard" variants, one of them allow to use missile weapons on ballistic mounts.
Also, the mounts themselves are weird. Tartiflette already said that there wre both low and mid-tech mounts on the ship, which indeed looks weird. On top of that, i noted that the 4 rear small mounts can actually use medium weapons.
Another thing, i can't order the movement of a single ship, the whole fleet will try to defend the spot. Here i'm asking my Eagle to stop rambo-ing.
And the whole fleet go back to defend (no Eagles were harmed in the making of this battle).
Played a bit more the Gryphon as well, got the same CR suicide problem when left with the AI, so i kept it as my flagship. I tried Megas's idea to fit it with Harpoons and a Hurricane, and i think it's even stronger than the Reaper one, mostly because you don't have to aim. Hell, i was wrecking stuff and didn't even needed to use its system to reload, but i think that's more a problem with Harpoons and the MIRV launcher.
The new Hurricane is broken, no doubt about that. The short cooldown coupled with the massive damage and excellent tracking make it a no-brainer. At the very least, the reload time need to be longer, that weapon is just unfair.
The Harpoon is more subtle. I never really liked this missile, the damage is very high and the speed and tracking make it a death sentence for everything that overload. The AI is extremely brutal with it as it'll immediately react to a vulnerable target. And because of their speed, there's no dodging or interception possible, game over.
It's reasonably fair during early game. You make a mistake, you pay for it. But later on? The Harpoon party become absurd, one ship overload? 30 Harpoons immediately fly to instagib it. The more ships that can mount Harpoons, the more dangerous the spam become. The community battle tournament that happened a while ago proved quite spectacularly that some missiles become exponentially dangerous in large numbers, lrms especially. In my late-game campaign where battles have a lot of ships, it's a bit like that as well. And it can be quite frustrating when you're the victim.