Shardbound doesn't appeal to me. There's a different card game I've been playing that I've reallllly enjoyed lately; I find the game to be extremely well made. I opt out of saying though out of respect, and hopes, of Duelyst.
KROSMAGA though is an interesting concept and game design. The major concerns I have with it are how stingy they are (or at least it feels) as a market and the game length. Game design spoiler (for those interested in learning and critical thinking, don't click):
KROSMAGA's system is a bit off due to the 5 lane implementation; this leads itself to an almost REQUIRED amount of minimum game length. Because of this, one would understand that games will be longer; and because of this, higher mana value minions/spells are better to have. This is a great game design analysis for those who look to compare it to Duelyst and why that is, but I will leave that for the individuals. Overall, I think KROSMAGA could benefit by a 3 lane system with only 1 fake Doofus (I like to spell/say it that way). However, due to some card designs, it may already be too late for them in this, and the game will most likely forever consist of overall long-ish games.