I can't get the Age of Rebellion beta where I am, but from what I've been able to glean the simplest thing would be to make the largest capital ships (Star Destroyers and their equivalents) tougher. In-universe, one of the advantages of larger ships is that they can simply carry more (I'm fairly certain volume relative to surface area increases as an object gets larger, but I can't be sure). That means heavier armour, more shields, more hull integrity and system strain, etc. HappyDaze's idea of a critical hit modifier makes sense, since a large warship will have dedicated repair teams and probably be heavily compartmentalised in a way that smaller ships can't manage. An ISD is supposed to be a beast: too powerful for a typical Rebel group to defeat head on, so they either have to avoid it while mounting hit-and-fade attacks on softer targets (the biggest stand-up fight before Endor is Hoth, where the Rebels get stomped), conserve their forces for a climactic battle (a "boss fight" near the end of a campaign), or come up with a sneaky way to disable it (an infiltration mission to cripple a critical system, or some other long-shot mission that can be the basis for a challenging few sessions). Anyway, if you've managed to get through my rambling so far, here's my own "first cut" at an ISD:
Silhouette: 8 (1600 meters long stem to stern)
Hull Integrity: 250
System Strain: 300
Defense (Shields): 4 all
Starfighter complement: 6 squadrons (72 ships), plus troop landing craft and shuttles
Crew (based on EU canon): approx. 37 000, plus 10 000+ soldiers and Stormtroopers, 20 AT-ATs and 30 AT-STs
Weapons: 10 6-gun Medium Turbolaser batteries, Fire Arcs (Forward and Port) or (Forward and Starboard), Linked 5, Accurate 2 (from fire control computers linking the batteries to the bridge, as well as dedicated gunnery officers)
10 6-gun Heavy Ion Cannon batteries, Fire Arcs (Forward and Port) or (Forward and Starboard), Linked 5, Accurate 2
4 5-launcher Proton Torpedo batteries, same Fire Arcs, Linked 4, Accurate 2
5 4-gun Heavy Laser Cannon batteries, same Fire Arcs, Linked 4, Accurate 3 (to partially compensate for the huge silhouette discrepancy between ISDs and starfighters).
10 Heavy Tractor Beam projectors, same Fire Arcs
Fairly nasty, but the poor handling and lack of rear-facing weapons would let smaller, more nimble ships move into its blind spots and do some damage, or at least keep clear. Also, spacemanship would have a huge impact on its effectiveness, so smaller ships or fleets with better crews would have a fighting chance. Still, in-universe it is expected to take on entire enemy fleets by itself, and the stats here try to reflect that.
Edited by PalpatinesValet, 24 September 2013 - 12:50 PM.