Okay, a few things:
1) The support set just seems bad too me. You are using none of Garchomp's strengths, although I guess you could say you're using his bulk. However, while Garchomp's bulk is great for a sweeper, it's not enough for a full on support/tank. That Garchomp is slower than everything it should be beating without any problem at all, while not really contributing much in terms of defensive potential. Don't even get me started on this, either:
move 4: Fire Fang / Protect
2) No to 10 or 11 Def IVs. While I don't like defensive Garchomp, its defensive are what really makes it a great sweeper. Like Nachos said, 102 base Speed is kind of iffy in this metagame for sweeping, but I reckon it's still a great sweeper simply because of its bulk when uninvested. Gimping your own defense to give Genesect an Attack boost is not worth it when you're now getting hit much harder by stuff like Bullet Punch, Mach Punch and all that kind of thing. Garchomp is getting more of his switch-ins and setup opportunities on physical attacks, not special ones. If you REALLY want to give Genesect an Attack boost, I'd much rather run 172 Atk / 84 SpD / 252 Spe.
3) Consider Focus Sash and Swords Dance on the offensive SR set as well. I've seen Taylor use it, and I've also tried it, and it's pretty much like Terrakion except it's a Dragon-type. The good thing is though, that he beats offensive SR Terrakion one-on-one because of Rough Skin breaking Terrakion's Sash.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.