If a group of contacts qualifies for a survey that you decide you don’t want them to get (or you accidentally let them qualify), there needs to be a way to remove them from the survey during the survey delay.
For example, if the survey send delay is 2 days, you should be able to see who is in the queue for the survey and remove them if you do not wish for them to receive it.
Survey workflow controls should more closely mirror workflows rather than having no visbility into which contacts are in the waiting period and no control over unenrolling them.