I need to gift GM to my SO now but more importantly, my trips already confirmed for 2015 - SYD, SOF, SVO, HKG + 1 or 2 more - cost less using SWUs than the 4 GUCs then trying to find Z+ fares since my dates are not flexible.
I also need the extra miles from 6 M/B SWUs than the 4 GUC sLUT for my SO to travel.