don't worry about the stats, they are weg based, but have a health bunch of math thrown in to compensate for different factors, but most people have no clue how the weg stats work anyway (they think 4D means 4 points and 7D mean 7 points, therefore an ISD does 300 damage and a ISD II does 850 damage, while a mon cal only does 120), that's because they are highly dependant on probability, for example a 1D weapon can never hit a 7D hull/shield, but a 3D weapon only has a 1% chance of even attempting to damage a 7D shield/hull. All in all it works pretty well because damage is depenant on how much you exceed the other roll (IE until you beat it by 3 you don't do any noticable damage) How I get around this is using the WEG numbers as quality ratings instead of absolute values, hull and shield values also take into account hull geometry and size
though there are a few really weird issues with it that I have 'fixed' primarily this is the mon cal cruisers, they get much heavier weaponry than they are listed as having, and ISD II's are nerfed to about 1.5x an ISD I instead of about 16X they are in WEG and the ISDs get thier heavy guns as well