1. Loos the devourers on the Raveners, as they will be in combat before you have a chance to shoot, its basically a big waste of points.
2. IMO don't twin-link the devourers, give one Warrior on one team a Barbed Strangler, and one warrior on the other team a Venom Cannon, instead of twin linking, give them Rending Claws so they can hold their own in combat.
3. IMO I also think that you have too much of a close-combat orientated force, which is fine if that is what you're going for, but in my experience they don't tend to do so well, and i'm sure lot of the other memebers would agree with me, instead of having those three big hormagaunt broods, maybe make one into a Devgaunt brood with toxin sacs. or just make a straight-up bare bone brood of termagaunts, or spinegaunts.
4. I think that flesh hooks are a big waste on most things, unless you have a board with alot of vertical terrain, also I would say the toxin sacs on the broodlord and genestealers may be a waste of points, as you should be waiting in cover for a good time to rush out and rend the opposition to bits.
thats about all I can see, though if I were you I would also give your zoanthropes synapse creature so that it can stick with those hormagaunts and keep them well rounded.
Anyone have anything else to add?