Well, now it's a bigger blob with high speed, a long trail, low refire and tons of damage against enemy capships (see video). 
Pfft...I still have to download 7-Zip... 
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(Downloads 7-Zip)
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(Extracts a file)
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(Runs a video)
It looks a bit like those railguns from Inferno: Alliance...and it seems a bit too strong and long-ranged. However, since this is an FS1-era video, I'll let that comment slide...and besides, those plasma cannons make the Lucifer deadlier, which is what it was supposed to be in FS1.
...I wonder how the Colossus would fare against such an enemy.
Those railguns were awesome.

Actually, I kinda ripped off the blueplanet railguns (which I should probably put in my credits) instead. Meanwhile, testing against the colossus has found that the ai keeps the colossus out of beam range of the default BGreens. The colossus takes a long time to go down, but the lucifer is untouched. If the colossus is in range, the lucifer actually goes down pretty quickly.
With all those new plasma cannons and sheath shielding while in normal space? Makes one go white in fear thinking about that.
Remember, beams pierce shields, so beams damage like normal but bombs have to take down the shields first.

The weapon is long ranged, but the damage over time is only a bit better than my improved SRed (where I changed the refire to 10s in line with the other shivan beams). In this setting, the shivans have finally decided to retrofit their ships and bring their best weapons, since the terrans and vasudans reverse-engineered their shield and beam cannon technology (and arguably other weapons for the kayser).