I don’t post in the forums very often but I’m not aware of any other place to submit a feature request.
I love the Duels game mode and have likely put hundreds of hours into it since it’s launch and I feel like the biggest pain point so far for me has been the inability to save a deck list or generate/import a deck code.
I know of more than a few people that would be very excited should you include the ability to either save Duels starting decks for future use, or at the very least give us the ability to generate and import deck codes for 15 card duels decks.
Also please update the Deck Builder on the www.playhearthstone.com website to support Duels decks.
I love the game, keep up the good work!