Well, you could still deck out if it is in your prize and you can't get to it, and seeing how they run through cards, it makes sense.
Though with that change, it kinda means that those decks like Virizion EX/Genesect EX and Seismeitoad EX are a lot less viable, as you can't reset for cards you need anymore. I was fine with it from the looks, as I like lengthy games like that