I have a suggestion for a meaningful change to the Twin Plasma Cannon I debated a bit with Kaks and Screet.
Why not make them into something with really heavy weapons strength (say, 200?) while keeping the usual 5 kms of (non-instantenous) plasma range, make them buyable at TL 15 (ingame) worlds or stations only and at a pricetag of say ~100.000 Cr?
That way, there would be a meaningful weapon more powerful than the military laser (it could be termed the "Plasma Accelerator") without being vastly overpowered due to its much lower range and speed - a real, but slow and more expensive/scarce alternative to the military laser.
How-To?
Just change the core game's internal entry for the Twin Plasma Cannons!
I think only one or two oxps are using them at all, and they use them as a sidenote for one ship or so. Nothing has been done with the Twin Plasma Cannon in the core game at all as far as I know.
That way, you would only have to:
* Rename it ("Twin Plasma Cannon" to "Plasma Accelerator")
* Give it a new TL (15 ingame instead of 3)
* Reprice it (Higher up as it should cost more if its better - my suggestion about 100.000 Cr instead of 200 Cr)
* Give it a new weapons energy (my suggestion would be 200 - the military laser has 26 or so I think, but compare the ranges - 30km (ML) : 5km (TPC) and the military laser hits instantanously while the TPC hits with plasma speed
That's it. The first three things can actually be done via oxp (I have played around with that option already) but the weapons energy cannot.
This way, all you would have to do would be to change three numbers (price, TL and weapons energy) and one name (TPC -> PA) and that's it.
I hereby put the whole suggestion up onto the boards for discussion.

L