For me the thing that makes this more interesting to me than Solforge and Hearthstone is that it has the potential to be way more complex. The ability to act on your opponent's turn and to respond to actions alone adds so much to the gameplay.
Eh, my problem with Magic is one part the mana system, and one part creature value. I'll skip the mana system thing as it's the same tired old arguments and can be seen as a tradeoff. My issue with the creature system is in two halves.
First, combat isn't tactical. It's strategic, and there's bluffing, but there are no real tactics because you only target the player. Just like in my video games I like it when there's more to combat, and this was the main reason why I fell in love with VS. System.
Second, creatures are too easy to kill. You would think that given the speed of spells it would be Creature > Sorcery/Artifact > Instant. And that's mostly how it is when it comes to dealing damage or running your deck. But when it comes to the power levels of cards it ends up being Instant > Sorcery/Artifact > Creature, because Instants are the primary way to respond to your opponent's actions. And in Magic strong creature removal is standard, rather than combat pumps.
Combined with the variance caused by the mana system, this means any creature above a cost of 3 or 4 is terrible unless it cheats it's way in. This means there's a cap on how much mana is useful unless you get a lot of draw power and gather multiple spells in hand during the later turns. The crazy amount of monster removal is one of the reasons I got so sick of Yugioh as a kid over a decade ago.
I mean, look at these two cards:
In Vs. System, these would be the capstone of your deck. Your pride and joy. And the game would close out with a clash of your titan against your opponent's, with plot twists and other effects to interact and counter each other.
In Magic, these cards wouldn't see competitive play outside of draft. Of course, I don't play Magic regularly, so I'd like to be proven wrong.
During this post, I noticed that the site has updated before the Kickstarter today:
http://hextcg.com/enter-the-arena/