I'm still playing my weekly draft, and have made a few runs through the Frost Arena single-player mode, which is pretty fun.
I'm consistently impressed with the core design. Like Malkav, the resource system has definitely grown on me since the Kickstarter. I was initially concerned that it didn't diverge enough from Magic's design, but in practice, it keeps the depth while cutting the the number of games decided by terrible resource draws by a lot.
I'm not a big fan of systems that are completely abstract and automatic, like Hearthstone and Infinity Wars, as they give up completely on a potentially interesting area for strategic choice. My favorites are games like World of Warcraft TCG and Might & Magic: Duel of Champions, which retain some interesting decision-making in the resource system without the potential for games that you can't even really play due to a bad resource draw. I don't think Hex's system is quite on that level, but it's pretty successful at retaining a good mix of depth, variety, and minimal resource screw.
My only complaint at the moment is the draft environment. The first set was incredibly well balanced and varied, but with two packs of set 2 in the mix, I feel like they pushed the explicit tribal themes a bit too hard, making R/S/D humans the clear best deck and B/W bunnies the only real viable alternative. Gets old seeing those two over and over in every draft, so I'm looking forward to a shakeup when set 3 comes.