Finally made some time to play this last night, and can't really add anything much other than has already been said.
I love the Desdinova, got a chance to have a spin with this thing in the Simulator (I didn't summon the spirit to take on the 'hard' mission). And yeah, the squall cannon is really cool but possibly a bit OP in its current incarnation.
The Nevermore is super, super cool. I love the lucifer thingy and it feels very cool to pop an overloading Tempest in conjunction with the antimatter cannon. I probably won't be able to do that again in a hurry.
I might suggest dropping the ammo count on the cannon, as I never felt as if my ammo was ever really limited. The way I was using the ship, firing and then backing off a bit, with the ammo recharge rate as it is I was never below 3 on this. Maybe if it was nudged down to 3 you would feel slightly more precious about using it, and would add a bit of a 'do I or don't I' feel to firing the thing.
I don't need to say it but I will anyway, the sprites, sounds, and effects are awesome.
Also I felt the variants on the Gondactylus were a bit sub-optimal. Not sure the bank of 3 vulcans is a sensible choice (one alone would provide decent PD and still cover the same general area, freeing up the other two points for perhaps a different role) and 3 autocannons (as opposed to 3 dual autocannons) would be significantly more flux efficient with perhaps a small drop in effectiveness, giving 6 OP to play with elsewhere.