Here's another way to stop the guest from automagically being resized at each swipe:
pref.autoFitGuestToWindow = "FALSE"
pref.autoFitFullScreen = "stretchGuestToHost"
Taken from: https://communities.vmware.com/message/2293562
Come on VMWare team - why is this not a setting in the preferences pane? This has been a problem since version 5. Do you guys actually use your own product in the real world?! This is something that EVERYONE runs into sooner or later, hiding these in a bizarre configuration location doesn't make for a professional product.