I'm playing the beta. I was never a serious TCG player, so I can't tell you if it's too much for noobs or not. Seems interesting enough to me. It's not dumbed down to the point of Yugi-oh or something.
The problem is only the rate at which you get new cards I think. Booster packs, which contain only 5 cards, cost 100 in game gold, and you get gold at a rate of 5 per 5 per games + 40 per daily "quest", which is something like "win 3 games" or "kill 40 minions" or "do 100 damage to heroes" or something like that. 5-card packs seems small, but I guess it's okay since there's no mana cards. Mana is just accumulated at a rate of 1 per turn for the first 10 turns, then stays at 10 forever (unless you use some card abilities to change that), so the cards are all actual cards that do stuff.
Oh, you can also spend 150 gold entering the "arena" where you build and play a deck from random cards, and win "prizes" including possibly packs, gold, and "dust" which is supposedly used for crafting, but I haven't figured that out yet. I don't know the payout scale for the arena, but it's probably better than 1 pack per 100 gold if you're reasonably aware of what you're doing. So far I've only tried once, went 4-3, gold 1 pack and maybe 40 gold and 100 dust.