This is mainly a fluff concern, but I do think it's a bit off that the VT-49 Decimator, which is supposed to be an intimidating and effective war ship, has weaker armaments than light freighters like the VCX-100 or the YT-2400. In my mind the Decimator's firepower should be at least on par with them, if only because its dedicated purpose is to be in war, whereas the freighters are, well, primarily freighters. In the lore, The VT-49 has two quadruple laser cannon turrets and a ton of missiles and bombs, while the freighters have double laser turrets, some single lasers and some missiles. So to me it makes little sense that a naked Decimator actually has weaker primary weapons than the freighters. One of the entries online states that its primary use was to firebomb infantry, but it would still be equipped with proper ship-to-ship firepower.
Arming it properly would make it even more expensive, but I would still love to see the Decimator portrayed as a properly powerful warship with fitting weapons. The arrival of the 2nd edition was an opportunity to fix it, but I guess titles and upgrades could do the trick. It's strange if you'd have to always bring Darth Vader along on a ship to make it capable of fulfilling its role.
Sources:
http://starwars.wikia.com/wiki/VT-49_Decimator/Legends
http://starwars.wikia.com/wiki/VCX-100_light_freighter
http://starwars.wikia.com/wiki/YT-2400_light_freighter