I think the issue is that, because the view is restricted people are keeping targets above the centre line so the lower C2 can’t fire as the ship is in the way.
It works fine for me using fixed, and you have the same “issue” with the ‘Vette if you don’t keep the nose on target so I’m not really sure how much of an issue that really is.
Indeed, it may be just it.
Cockpit design is bit odd, where actuall centre line is only slightly above of ship nose "tip", and that causes C2 bottom hardpoint (if gimballed) its almost enterily obscured by cockpit view. It makes really poor choice to put gimballs there - yet "random" non-PVP Corsairs Ive seen so far at Open, preety much all of them had gimballs there.
If ship with gimballed setup still needs point its nose at target to bear all the gimballs to target, then its not going have high "gimball friendly" score in my book.
But for my own ship, there was only one weapon that is been put in that bottom C2 slot - The pre-engineered railgun, Feedback cascade with long range and high capacity.
All I can say, its working very well, with every weapon bulid I used so far.
The missiles hitting your own ships is a problem though, that’s definitely not working as intended.
As for missiles, I used large seekers with 100% succes, at c3 slots at Corsair.
To put in context, I fired aprox. 500 seekers (at cmdrs obvsly), and not even single one of them, had hit my own ship.
It means that Corsair C2 bottom hardpoint, is wacky one for missiles.
But its wierd, as conda have those small hardpoints next to each other, at bottom and very end of ship, yet I do also use both dumbfire and seekers those slots, and cant really recall having being hit by own missile. And conda is quite larger in length.
In my experience, ship kits are completely insubstantial.
MCs and lasers will happily shoot right through various wings and spoilers close to them.
But not all of them... atleast it used be like that.
There was cases that ship kits did actually obscured some hardpoints on some ships, but it was like years ago, even to be voted in issue tracker or so.
Not sure wich ship it was, but preety certain it was bit vocal "problem" at time (ppl did complain about it in forums/reddit).
Cant expect Myself, to remember every and each bug to with full details.
Also, the new batch of ships, not any of these seems having "go-through" wich go by own ship hull.
It will simply not fire if obscured by ship frame, but cannot say same of older ships, and you gave all good examples of these.