I would really like to have a microflow activity in which I can define a confirmation. Output would be like an exclusive split with true or false representing the proceed or cancel button push. This way I would not have to "program" a confirmation form with al the close form problems you then encounter.
I was going to suggest this same thing. My team has to often create confirmation pages and separate yes/no microflows to handle the user's response. A Confirmation Message Action (similar to a Show Message) that pauses the microflow and waits for the user's response would be very useful.