From what I gather from discussion and just about every "pro replay" I've watched, The Advent suck in competitive play. This seems to be the general consensus. The new patch is going to be great, but I'm not convinced that balance will be improved. I have watched dozens of replays only to witness the Advent players be utterly crushed by LRM or Assailant spam. I challenge the Sins community to supply replays of Advent playing well, or even dominating in a 1v1 or 2v2 setting against their TEC or Vasari adversaries.
I think you're forgetting something here. Sins is new. Very new. Very very new.
If you compare Build orders, strategies and whatnot to older games like Starcraft, or the Galciv series, you'll see that even today (10 years later), strats are still under construction, trying to be perfected. Advent, or any other race for the matter, won't have the ability to say "this is the way it should be done, and do it well or you'll lose."
Advent suck early game, badly, and I have my own way of dealing with that. It's all player-based, and it'll take time before anything truely productive comes out.
On a side note, I'm surprised Huntings BO's became popular so fast. They may work for him, but that's not the way it's gonna look in the end, trust me.