I've like the previous Thing Things but this one seems poorly implemented. You run out of ammo way too often an all the levels seem to be small contained spaces where you just jump around until you kill enough people to get through. Theres no real variety and it make the game more tedious then fun.
If you guys look at the window when you first connect to the game there is a button for Ranked Matches and for Earning Cards. Clearly they'll have these features in release they just don't have them in Testing.
The Decks are too stacked. I think it'd be better if a 3v3 deck had 6 cards in it that it randomly selected 3 from. (5v5 would be 10) that way you can still plan out your deck a little but it prevents constant stacking of the best cards.
The difficulty has definitely gone up. You can't follow the same upgrade path either. Challenging, but I think once people know the upgrade path it'll be back to business as usual.