You'll be able to hopefully dust those cards for their full value.
I also wouldn't blame Blizzard for you spending your money lol.
I hope I can dust them for full value. Fuck.
I'll blame Blizzard all I want if I spent a bunch of money and then the cards I bought become useless. That's shit that needs to be stated WAYYYYY in advance. Either that or don't allow people to use real money in the game.
Had I known ahead of time I would have spend far less money and focused on the new ranked card-base, and would have had the better cards for it.
But If I can dust the old cards at full value, then it's moot. I really, really doubt that's going to happen. I wonder how many other new players got fucked after being roped in by the christmas sale? Blizzard knows how to make money!