Yes, as a former chair, I would say that while it is great to have diversity of thought—and when witnesses are submitted there's a number of them, depending on the representation—you can't always schedule the witnesses when you want to schedule them, because they are not available.
I would say that if we took the intent that we would have diversity of thought and a mix of the witnesses, that would be a great way to proceed, but I wouldn't fall on that sword if there are scheduling issues.