Pokemon TCG Online: Yveltal/Seismitoad/Garbodor in the latest Standard format

I was checking out The Top Cut and a recent report on the Regional Championships shows a dominant showing for this particular deck: Yveltal/Seismitoad/Garbodor. Here's a video by the site featuring the deck (not an exact list of the ones used in competition and I think the amount of Seismitoad normally used might be 3-4) as well as gameplay. It is basically a version of the Yveltal/Garbodor deck (video) which was the US Nationals 3rd Place Deck (video). ProPokemon site had an article on Seismitoad EX and how it might affect the Meta and it turns out the suggestion at the end on adding Yveltal EX was spot on with what had happened.