I just had an interesting experience call with the GS #. Six minute wait but I think I ended up with a legacy GS agent. I purchased a one-way J ticket from Mexico to US and called to open up Saver Business Award space for Mrs. Limey1K. Agent was very pleasant and began the process during which, she asked me for the date or PNR of the USA-Mexico tickets. I asked her why that was relevant and she said she wanted to see what was done with tickets heading down to Mexico before she opened the Saver Award on the OW return.. I told her that I booked two MP award tickets for the USA-Mexico leg, applied PPs and both were waitlisted, She said "ok, as long as you didn't force anything in that direction, I can open award space on the way back".