Pretty much all of the 2010 faq is useful and necessary stuff. Explaining various rules 'errors' and etc. Yes, it is the blueprint for 2.0, no it's not 2.0, but it's as close as we may ever get.
I don't really get why the HA's have decided to add new ships rather than doing any revising of the older ones. A lot of ships deserve some minor changes, if not in stats, then in points value. Some even deserve a small points increase (I'm looking at you devestation). Power creep is always an issue, but the fact is that it sells models, and isn't that in a way a bit of what we're looking for? to increase GW's sales of BFG?
The thing is trying to get it as close as possible. Honestly I could probably name half the vessels of any given fleet that deserve some slight modification, even if it is just a 5 point change.
Well.. since I'm on the subject here's my opinion of which ones need revised and the reasons why:
Chaos:
Devestation/Styx: Both are at least fairly available ships in the chaos fleet, the problem with the styx isn't exactly that it's over costed (which it is), but that the Devestation is slightly undercosted. The internal balance here needs to be addressed.
Carnage/Murder: I feel that this is a bit more for fluff reasons, but the main problem is that the carnage can get 10wb at 60cm instead of 45 like the murder, and at 45... well it has more firepower in the one arc for 10 points more. The murder is supposed to be the chaos equivalent of the lunar class, and I rarely see them taken. I think that making the prow lance lfr would be adequate.
Retaliator: the only grand cruiser that has issues, but like the styx, it is beaten out by cheap devestations
Battleships: The Planet killer outshines the other two, but it's expensive, I'd probably leave it alone as it is a character ship. The despoiler has some issues. The desolator is probably fine.
Escorts: the iconoclast should be reduced by 5pts as it is a very weak escort that needs to be close to enemy fire. The other two are fine, but some people complain about the idolators confusion of roles.
IN:
Battleships: The Apocalypse class; I don't know how it will do now that it has it's critical effect faq'd, but it does deserve a bit of revision... maybe. Then there's the Oberon-Emperor problem, where the Oberon has a confusion of roles, and the Emperor is slightly undercosted.
Tyrant/Dominator: for 5pts more you get more weapons batteries and a nova cannon! basically for 15 points the tyrant gets a few wb at a marginally longer range, but fewer of them. I would drop the Tyrants cost.
Dictator: I don't know what to do with this, it's just severely unpopular compared to the mars and emperor options for LBs
Excorcist: I never see people take these, but this is likely because it is a weird carrier, better replaced by a mars or emperor.
Endeavor Variants: These all have issues.... A lot of them....
Firestorms: Well... these have kind of a confusion of roles, and can't compete with the swords or cobras... I would drop their points..
That's at least for the two 'main' BFG fleets. *Ducks for flame*