This was a cool article, but there was absolutely no mention of the thing I'm most worried about with regards to this game:
Do you know anything about the 'premium boosters' they mentioned several times in the official stuff? Do you know if they'll just for saving time or if they're required to get some cards? How much will they cost, how many would you need to get a full set of card? Basically if you have any information about the premium packs, I'm curious.
Also, will you be able to get 4 of each card, or only a set number?
This is what I'm worried about too. I get the feeling that you're not going to be able to unlock every card, at least not playsets, without buying the packs. If that's the case, then it really seems like this is going to be a super watered-down version of MTGO to me.
Building your own decks also means that online play is going to be abysmal in random matchups. Unless they work hard on good matchmaking, it's going to likely happen that you either run into someone way below your skill level playing a 100 card deck, or someone way above your skill playing a deck with 4-of every bomb rare. I suppose this is more like actual Magic... but I don't think it's a good thing to be. The DotP series has always felt more like it should be an entryway to the full game, with the paper version or MTGO being the point that it jumps too. Having it be more like those seems like it could drive newer players away.