It's not a bad list. I don't rewrite peoples army lists, I just suggest how to improve each unit and use them to their best potential.
They Hive Tyrant could benefit from Hive Commander, or, your units could benefit rather. Tyrant Guard, as I have recently discovered, are crucial to the HT's survivial!
A VC on the Warrior is essentially useless, St6 blast w/ an additional -1 glance result is hardly effective on light transports. I can't remember if you can take a Stranglethorn, but if not, then the Barbed Strangler is pretty good.
Genestealers are good!
30 Hormagaunts can be a bit excessive, 22-24 is a good number. Take Toxin Sacs instead of Adrenal Glands, or both, but T/Sacs should be first choice hands down.
Raveners, GW screwd them up, expensive for their worth, I would drop them and put the points elsewhere. Oh, they are Fast attack, not Troops.
Gargoyles, are awesome. 20 models are very unweildy to play with on the table. I suggest single squads to be about 14 models. Also, Gargs are so cheap and adding T.Sacs and/or AG is so cheap that is well worth the investment. Decrease the numbers for T/Sacs at least.
Carnifex: With BioPlasma this unit is screaming for a Mycetic Spore!
Trygon, are always great and even better with A.Gands. You do need some more Synapse and this would be the unit to upgrade and make him Synapse for being a Trygon Prime, 18" Synapse range!!