Ok so...
The ratio doesn't even stay the same between all races. There are a number of standouts. The Mentu has no offensive beam capabilities while the Fenris, Leviathan, and Aeolus do. The Aeolus puts all other Terran and Vasudan cruisers to shame on nearly all counts for both offensive and defensive capabilities. The Moloch is drastically under powered for offensive weaponry compared to the Deimos and basically equals it for anti-fighter capabilities. The Ravana in a 1 v 1 direct combat match will beat all other destroyer types quite handily. Hrrmm....
This discussion was not what I intended
My argument is not "all cruisers should be exactly the same" it's that "the Lilith can happily take out a destroyer... is that odd to anyone else?" It's not like I want to change the original game... I just find the Lilith to be unusual.
I wanted to know if Volition really intended the Lilith to be a a roving Juggernaught of destruction, or just a cruiser with a bigger bite than usual.
I don't know why this hasn't occurred to me before, but does anyone else wonder why there's a cruiser with three quarter the hitpoints of an Orion and a beam that's better than the BFGreen?
It doesn't even seem to be used to further the story, as the Lilith occurs only once in the main FS2 campaign
On the other hand:
Although I disagree with Trashman that there is a consistant ratio between races, I would agree that in general the firepower of classes tends to be in the same ballpark.
An Aeolus may be better than any other T/V cruiser, but will nearly always loose to
any corvette. as will Fenris, Leviathan, Mentu, Aten, Cain, and Rakshasa. It's really really hard for a Corvette to be taken out by a cruiser alone.
A Lilith however handily beats the Corvettes and severly damages destroyers
A Moloch may not be
as powerful as a Deimos, but it can still damage one. I would compare them to an Aeolus and a Leviathan.
The Ravana 1:) was supposed to seem like a second Lucifer and 2:) Had a tendency to loose subsystems alarmingly quickly when faced with a corvette.
You definitely have a point about the Vasudan cruisers lacking big guns. The Aten was stated to be weak, but the Tech Room suggested the Mentu had considerable firepower. I suspect it might have had to do with balance in Rebels and Renegades... but it would have been easier (I would think) to just not beam free the cruiser in that mission.