I got it working and have played a few games.
Order seems weak from what I can see. Their cards are just objectively worse. Growth cards have insane synergy, and if you compare cards the order ones with similar effects are just plain worse.
Seems the case, I've lost a few times to growth because of the simply amazing spell cards the have.
Buff everything with +2 attack, but add am extra turn, then play a spell to reduce turns by 2 = instant attack for the entire army.
I do like Order though, but it's taking quite a while to get extra good cards. I don't even have any siege weapons yet.