Vaaish,
I'm supprised no one else has latched onto the weirdness of the Battle Barge GC!
Modelwise it doesn't look that odd as the Battle Barge is smaller than all other Battleship models (I think...) Infact the Vengeance is quite comparable. Keep in mind the Battle Barge has got that 'thin' neck and has little volume for it's length. The Repulsive is quite small however....I suppose some of the bigger mass could be explained away as the 6+ armour!
Also the Battle Barge model seems quite sturdy on a small base. Also having a small base helps out against NC's (depending on which rules you play by!).
Other than the practicalities on the table, a Battle Barge is just a big Strike Cruiser. It being a GC rather than a BB makes it far more manuverable which given it's purpose as a fast assualt transport seems to make sense, especially with their attack rating. But more than that it allows it to keep pace with the strike cruisers while still dwarfing them and makes it cheaper so you can include it in 'raid' games of 750pts while still being 'unsquadronable' with strike cruisers.
I'd also like to point out that while it is a Grand Cruiser for game purposes it can still be considered a Battleship in fluff. Grand Cruiser is just it's 'type' not it's Imperial designation.
zaxqua,
40K writters (including codexes), quite often get the scale wrong for BFG. I guess it's not too important to them though as it doesn't really affect the game(40k) or the story being written.
The Vengeful spirit would have 4 Prow Lb's if it didn't allready have prow weaponary... Good template though.
Storm Ravens are assault boats!
But they're only optional, losing the 4+save for 10cm may not be a fair tradeoff but it's upto the player.
BaronIveagh,
The lance limitation seems really strange when BC's are really good in space combat and SM's would need lances in a planetary assault to kill war engines. It should just be range that is limited!
Cheers,
RayB HA