Is there anywhere on the official Blizz forums to voice opinion on this? I'd very much like to say "Please Don't".
If it is Blizzard's plan to try to lure back CCG players who relegated Hearthstone to a number two game then it is a very bad idea. They will just play even less. One of advantages of Hearthstone that you can play once per three days and get a decent chunk of monthly rewards but they are taking it away.
In my opinion, HS is an extremely slick and accessible number two/casual game, and I like it exactly like this. As a competitive PC game, I find the randomness (or maybe really it's just losing to randomness) super frustrating - whereas sat on the sofa with an Ipad completing daily quests I'm absolutely fine to get my ass handed to me by a ridiculous draw or a lucky Puzzle Box etc. Striving to be the best possible - or at least the most prolific - hearthstone player I can be isn't really something that appeals