Absolutely no way can it be DOGSO, the referee can't look and say "oh look, it's Gareth Bale, he'll score from there", it could just have equally been Keiffer Moore on the ball and he would hit the target from there 1 in 10 at best. It isn't even close to being obvious enough for DOGSO.
I thought the referee was OK. Some free kicks were soft, some were just plain wrong, but his cautions were generally correct. Bale's shouldn't have been, but I can forgive him for the angle he had, it would have looked like a foul from there, and once a foul is given a caution is inevitable.
What annoyed me most was his "proactive" talking to players at set pieces. On more than one occasion he singled out players that hadn't even been close to each other, and they understandably looked completely baffled. FIFA have obviously ordered this as it has happened in every game, but you've at least got to pick on two players that were at least within touching distance of each other.