Yet another small UI suggestion.
Often, I pre-make the items I need for dailies before I even take the quest. (In the case of potions, and other small-inventory items, I may pre-make many of them in a single crafting session.) Also, gathering dailies simply serve items up from your inventory.
So when I talk to the trainer, I likely already have the turn-in. But I have to go through a lot of dialog boxes to complete the transaction. First one or more to get to the "accept quest" page, and then another set to get to the turn-in screen. I am suggesting another button on the "accept quest" page saying "Yes, and I already have it." or something similar. (Text altered to fit the particular quest dialog narrative, I suppose.) Select that button, and the turn-in page pops up right away, skipping everything in-between.