It would be VERY helpful to be able to change the capacity for an opportunity WITHOUT having to do each shift individually. For instance, on my site, I have "cats - a.m." 7days a week/365 days a year. I don't want to have to do each one individually and I don't really want to deactivate the need and start over with a larger capacity since there are folks already signed up in advance for upcoming shifts. Make sense?

I agree completely! I just had to go in and individually change the capacity for 32 shifts. It would save so much time if editing could be done all at once, or several at a time if the change isn't the same for all the shifts. :-)