At present, the Campaign Summary view takes a long time to load and managing the Departing survivors requites a lot of refreshes and reloads. In the next release of the Manager, all of that is going to change, and the view is going to have much better performance.
Just to give you an idea of how much of an upgrade this is going to be, the feature demo on the right shows a preview/teaser of the new Campaign Summary view controls at mobile resolution: if you've used the Manager at all, it's going to look pretty revolutionary.
Barring anything unforeseen, I think I should have this release ready to go early this coming week, if not sooner.
Thanks for using the Manager!