Actually Prysin I think the Gamma raids are the best thing that happened to the Corsairs. Originally they were a response to what was going to be yet another FP9 gangrape - it ended up turning on the Corsairs which I found rather poetic. Later on it decimated the bored Legates/Osiris cruising around anywhere south of Gamma where they would have exactly no resistance. Now they only cruise around at 3 am when all Hessians are asleep, and we actually see Corsairs in fighters and bombers more often now that their main enemy has a way to deal with capship swarm without having to outnumber them 2:1.
The Jormungand isn't a n00bcap, but that doesn't mean it can't take a Legate on and win with proper support (as battleships are expected to be used). It can definitely rush an Osiris and win one on one as is expected from a medium battleship. The forward gun is also a fun twist.
Also, nothing Corsair got nerfed except the Osiris which was massively OP anyway. So stop spreading lies.