Umbreon can cause alot of problems. Moonlight Fang is a great counter to almost any deck except Machamp and Kingdra. And you can abuse SSU with him.
People forget about BlazeRay since it's the black sheep to LuxChomp, but it's fast and consistent and can recovery quickly. SP's will start using more Aaron's.
I agree that right now there are only a few builds, but we still have a long way to go, and decks change every match. People are always finding new techs for weakness, or a simple throw in that's a game changer. Play test against builds you know are staying, such as LuxChomp, With Unown G gone, someone may try GenChamp again, or FlyChamp. Try something new and shake up the meta for a change.