As a new player only playing for 3 weeks I think the change was needed to stop the bots/multiple accounts but only as a temporary solution. It hurts new players WAY more than it does the older ones.
The bigger problem is the bots/multiple accounts, no matter what they do with the price of the QPs, if they are profitable the bots/multiple accounts will use them. Sure make them more expensive but if they are even 5% profitable overall bots will exploit them.
They have to do something about the bots or the lower ranks will just be newbies like me fighting 100s of bot accounts.
The initial buy in of $10usd is cheap, if the bot does your dailies every day, even without QP, if you get lucky and get even 1 gold, or a few commons you make back your initial investment quite easily.
The QP made the problem more obvious and easier to exploit, but QPs aren't really the problem, its the bots, stop the bots and the real players could benefit from QPs even if they cost 1dec each.