The more I've played against weapons with the trait the more I tend to agree. I'm probably going to propose house-ruling it out.

As a side node, fighter exclusive on the other hand does not grand that much advantage and not even cancels the additional difficulty for shooting at fighters. Perhaps this could also be adjusted?

I think it's easy to create a super-power weapon. Take some sure winner as repeating combined with a good ACC and also an inv range mode (as in the Grumm eviscerator), and give it good stats (especially a long range), and also maybe continuing damage, and you can ravage the enemy fleet. Include then Point defense, and some good anti-fighter weaponry and you will be ready against most threats. Some medium weapons will also be needed against numerous small ships (gunboat-like). And that's just a possibility.
But as a personnal choice, I prefer more challenging fleets, with a logic behind it, or those already made (both starmada sourcebook, KA/RA/AA, and other similar designs), and not uber fleets designed with a license to kill.
Starmada gives you choices and that's the beauty of that system.

Marc

I was actually more interested in your thoughts on the matter. All of your multiplication values have math behind them (Extra Hull is x3 because you have a 1/3 chance of hitting hull, etc), and I was curious for the basis behind Starship Exclusive.

Starship Exclusive answer: Independent Fighters. (My B-Wings can't be hit by a majority of the armament on the Star Destroyer? Sweet.)

I think the issue that concerns people the most is there are weapon designs that are heavily geared towards starship destruction and they are just grabbing the starship exclusive to reduce the cost (because, why wouldn't you?). 

For a weapon that is [ROF 1, IMP 5, DMG 5, Catastrophic, slow loading] - it should not receive the same discount for starship exclusive as a weapon that is [ROF 5, IMP 1, DMG1, area of effect, increased hits].  The second one is much better against fighter than the first, and losing the ability to fire at fighters is a major tactical limitation - not so for the first one.

I think for the calculation of starship exclusive should be reflective on how much the weapon is really giving up by not being able to fire at fighters.  The idea equation would some how account for everything on the weapon that is a "waste" to use on fighters.  That would be complicated for sure though.  Here's just a sample of what I'm thinking of just considering impact and damage:

Starship exclusive modifier: 0.7 + 0.1 * [(IMP-1)/4] + 0.2 * [(DMG-1)/4]

I agree that the metagame is the largest factor - however most of the other modifiers were very accurately calculated based on probabilities - this one is a bit of a pickle.

-Tim

But we do like it - its thematic and models some of the weapons we are imagining quite well.  The only problem its it can be a bit too cost effective for some weapons.

That holds true for other modifiers as well though - say "ignore shields" - useless if your opponent doesn't have shields.  But these modifiers can't take that into account - they just have to be priced for what they do in typical circumstances.  Getting screwed because your opponent brought scissors and you brought paper is just part of the fun. 

I like your logic on how you came up with the 0.7 and the 0.6 for starship exclusive and fighter exclusive respectively.  I think though that this pricing only holds true for weapons that have IMP 1, DMG 1 and no "extra hull damage" traits (and conversely anti fighter/area of effect).  As soon as you start adding imp, dmg or hull killing traits, it improves the weapons ability to destroy starships, but does not improve its ability to destroy fighters.  Thus if you were to do the same "dual mode" calculation on them the split would shift.

I'm going to work out one for our group and post it here for everyone to pick apart.

My large ships have two batteries, both of which are range=18. The main guns are 1/3+/1/5 or 4  with Piercing+2 & Starship-exclusive
(we don't use Piercing=3, 2+ to hit, and max range=18,except on bases)).
Having this main battery with Starship Exclusive does save on the cost.  These ships also have 4 Laser Cannon. 1/3+/1/1.
Although it would be nice to have the mains able to hit fighters, etc, the savings in cost more than compensate.  I don't use fire-control, the SA anti-fighter, nor the semi-useless anti-fighter batteries.  It works for me...

You never roll more than one IMP die vs. fighters.

Does that apply to Flotillas as well? I had been loosing entire flotillas to high IMP weapons and was wondering if I was doing it right.

That leaves me with 2 more questions:

1) For flotillas do you apply an IMP>1 to only one of the ships or does each successful impact roll result in one kill?
2) Do apply shield modifying traits when rolling to impact against fighters (such as piercing, ignore shields etc)?

Thanks!
-Tim