The squid is def a unique ship from the others. But it is missing something.
I am gonna go ahead and suggest this YETT AGAIN and people will again agree.
The squid is fast in every direction, except for going up and down. The only ship that goes faster than the squid vertically is the Mobula. But get this, the mobula was a new ship, meaning its concept was new. Also meaning that its traits and statistiscs are something you wouldnt welcome to the squid PRE mobula.
But now that we have something like the mobula. Giving the squid aprox the same ammount of Vertical power as the Mobula can really create a Speed-Tank ship.
When the squids engines go down, you still have the baloon. IF your baloon is down, you have your engines. If both are down you are pretty much dead. But in most cases its either one or the other. Giving the squid Mobula power may just put it back into an unkillable state (Unkillable with proper squid piloting)