One thing I think that needs to be implemented for a smoother playing experience is a way to change decks without having to go to the deck editing screen. My suggestion is to have a tab next to the 'Army, Game, Clan" buttons that lists your decks. If your not in a battle or an event you can handily select that tab and switch decks. This allows you to change decks after joining a brawl (but before the battle) instead of having to exit the brawl and go to the deck editing screen, thereby forfeiting your place.
@TheSnickaz. It's called Barroom Brawling. And it is relatively better than what you asked for. http://clashofthedragons.wikia.com/wiki/Barroom_Brawling
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