New patch added:
Fixed a few bugs (thank you for the reports)
Added a few in-game explanations
Raised minimum deck size for arena to 35 cards
Gold and Platinum special spins are now giving upped rares
For the next patch:
A few cards might create exploits or obnoxious mechanics with the double draw/deck. I am against banning those cards from Arena decks, but I can modify the Arena AI adding some "guilt" when chaining more than 3 silences etc. What cards do you think should get a special AI treatment?
Silence- Yes. Cards that can chain so you don't do anything at all the whole game is evil.
Nightmare- Probably. Hecate has 6, but has 66 cards.
EQ- Maybe. Seism has 12 copies, but he has 92 cards instead of 70 (minimum deck size for Arena).
BH- Maybe. Dark Matter has 12 copies plus 4 Gravity Nymphs, but he has 94 cards.
FB- Probably not. AI doesn't play it well. Also, Hermes has 12, but he has 116 cards.
Explosion/Steal- Maybe. Again Hermes has 12, but it's mixed in 116 cards. Rainbow has 14, but he has 120 cards (albeit with Hourglasses). Eternal Phoenix has 8 in 60 cards.
SoD/SoG- Probably. Having so much potential life gain is just crazy. Pair this with most any strategy and you got an über-strong deck.
Any Shields- No. Dim Shields and Wings chaining are okay to me. There's enough ways around it (alt damage like poison or bolt, PC, and Momentum).
What if instead of changing the way the AI plays these cards, we put a scaling cap on the number of copies of these cards depending on deck size? It could be something simple like 1 copy of a card for every 10 cards in a deck. So a deck could only have 8 Silences in a deck with 80 cards. As you can see above, a lot of the FGs have the maximum copies of these cards, but because their decks are bigger, it's not as bad as in the Arena.