It looks like it doesn't know why it wants Wilderness Rec because ir's actually playing it as a fair card — the pack has it so that you can cast your sorcery-speed threats from your other pack without stopping you from playing your flash stuff on your opponent's turn. I agree that Wildborn is
probably excessive — it's just that I
know you're using my packs as inspiration instead of just using them as-is, so I haven't been sweating off-power cards.
As for the emblem idea... I think that the best approach there would be to use the
Theros Hero cards as your "emblems", or something with a similar scope and power level. The thing about giving everyone the same build-around emblem is that then, unless you built your cube around that emblem,
everyone is going to fight over the cards that exploit that emblem.