I actually saw this project on KS but it didn't register strongly with me. Four decks from a new guy on the block? Overambitious, indeed. It's not like they're terrible decks, but it's not like they're outstanding, either.
Futura Black - functional but boring.
Helvetica - fonts as deck themes are overdone, and this is one of the less functional ones I've seen.
Dragons - tweak the indices and I think there's a good deck in there. Also, ditch the Courier typeface for something a bit more medieval. Courier is a terrible choice for a deck design such as this.
Metal Solids - at least the courts are whimsical-looking, so there's a kawaii-for-nerds factor in there.
One thing they're ALL missing: images of the card backs! These could be nothing but solid white on the back and we'd have no idea! It shocks me that people fund a project like this without seeing all of the deck elements.