As Trello, it would be very useful if in the verification list, the card owner, could tag a member to do specific tasks.

Also it would be good if the owner could add a due date for that specific task.

Exemple:

You have your task (card) and inside your task you have your verification list that have other sub tasks on it that will have different people to realize it. So if you have a list with 10 sub-tasks you can mark each line to a different person.

Also you can add a due date for each one of this sub tasks.