I would love to see a new profile based feature to find the best decks for a players levels. A similar link to that one:
To search for the highest leveled decks for a specific account. This would especially help for the duel deck search (as I build a lot of cw decks for my and new clanmates) to easily find the highest possible decks for an account. The major difference is that you dont restrict the deck search to one level but rather search for the highest leveled decks possible. Across all levels. Also including and excluding all cards.