I don't really see how LuxChomp isn't that great of a deck. I can see saying it's overrated (which I disagree with) or that there are better decks out there (which is arguable) but to say that the deck that performed well at Cities, and won the high majority of States and Regionals, and is still being played and winning at BRs this weekend isn't that good, well, that's just silly to me.
For what it's worth, I've played LuxChomp since Garchomp came out and have faced 4 Donphan/FlyPhan/etc. decks with winning records, and have never lost once. I don't disagree that Donphan has type advantage versus Luxray, and that it's a good card, nor do I dispute that either FlyPhan or Straight Donphan are the best ways to run the deck, simply I just don't feel that it's all that good in the first place. It's neat, but I don't think it deserves to be talked about in the same sentence as LuxChomp.