No, the Pyri is not too fast, the Squid is too slow.
Agreed. The Squid should be like, 2x as fast as it is. Right now, it's trivial to keep a squid in the gun arc for the tiny amount of damage that kills it.
Maybe take the hull down by 1/3, and boost the tri-dimensional speed properties (up, down, for'ard, astern, turning) by 2. Then it becomes a real challenge to pilot (overturning everywhere! Must plan maneuvers ) but in the right hands, wouldn't be around long enough to be shot.
Might completely destroy game balance, but I'd give it a try!