Apologize if this has been asked and answered. Did a search but didn't find anything. I'm trying to upgrade my parents to Asia using my SWUs. They are both Premiers. There have been a lot of discussions about no advance confirmed upgrades on the TPAC routes to NRT from any destinations, which I find it to be true. They're leaving on Nov 1 and returning on Dec 16 from SFO to NRT. .bomb is showing NC0 on every route that I've searched (ORD, SEA, IAD, SFO and LAX). They're on the same PNR. Should I split them apart so that they have a better chance of clearing in advance? I think the possibility of 2 people getting cleared before DM is fairly low. I feel as if UA opens one seat at a time on a rolling basis, and then it's all based on status once DM gets it. Any thoughts on their chances being higher if I split them? Thanks in advance.