I do not agree completely. Same as Marines will never be for fleet engagments, like Dark Eldar the Tau Kor'or'Vesh pure fleets shouldn't be engagement elites either. It's their role: raiding, assisting the main battle line.
I agree certain fleets should be better and worse and certain things, absolutely. Being at a dire disadvantage though, not so much.
Heavy fleet engagement level. Bring it down to 1500 for proper comparision. 
Also: 2000pts should be 2nd Custodian imo.
Also: Chaos fleet should have carrier otherwise they die missile death.
Weren't the Kororvesh created to be a true military arm of the fleet dedicated solely to combat?
They shouldn't be so disadvantaged in my favorite size battle

Fighters I'm sure you know is not the only way to deal with ordnance, though that was the one advantage I acknowledged to the Tau.
You're sure? 345pts vs 270pts. 22 batteries + 5 lances (37) vs 18 batteries + 9 lances (45)
I think the Chaos escorts are in dire problems in a direct duel. Wardens level Iconoclast with batteries, lances for Idolators.
Greater speed and Idolator's longer firing range.
That, Horizon, is why I am fussing about the Kororvesh
You are underestimating:
* Tau Alpha Strike
* Tau Missiles
* 90* turns (this is a real biggie when used well)
* Tau gunnery @ 45cm.
So, I do not agree on your fuzz.

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I did acknowledge that Ordnance was the one thing Chaos lacked in this case. This isn't even my optimal Chaos list, it was at the time a 'lets see if I can win without ordnance' list.
The Tau will do damage with the missiles and AC waves, but it will be mitigated until around 45cm because of chaos shooting. You say tau has alpha strike, when that actually belongs to the Chaos fleet. Once it hits 60cm, its as scary as the Tau fleet when it hits 45cm. 90* turns simply help the Tau come to grips after the Chaos ship passes and brings its broadsides to bear again. So, to summarize, out of those final points you made I only see the one about missiles being valid.
I challenge anyone to schedule a game with me on vassal to change my mind
