Most irritating team ever lol. I haven't had too many problems with it but that's because ever since it started popping up I've been using RestTalk Shed Shell Tran :) Anyway, the only real problem with it is that Dragons which don't lose to Genesect (think Kyurem, SubRoost DNite, etc) can definitely be problematic. Scarf Terrakion is as always an issue too if Dugtrio's Sash is broken. Finally, Defensive Politoed isn't that easy for you to remove, but I get that you can normally work past it by threatening V-Create to force it in and out until it's in Dugtrio's 2HKO range.
Only other thing, I really do think Thunder Wave > Toxic on Xatu. Yes, I read your justification for it, but honestly on a team as offensive as this, other weather inducers don't really care (with the exception of Hippowdon, but Hippo is never going to stay in against Xatu anyway) about being poisoned. Nothing on your team bar Xatu can stall for Toxic damage.