If your like fishing or something and the Duty Finder pops up!
Why not just let a player click "accept" doing this will automatically switch back to the class and gear you qued as the dungeon for, that way players don't have to stop.... open a menu change.... see that not everyone was ready.... switch BACK again to wait more.

Make it more automatic. The less work people have to do that isn't needed the better.
If I'm crafting, the que pops up, just let me hit accept, and if everyone is ready, throw me in the instance as my tank.