GUKPTs are a lot more expensive to update than DTD events Jase, 4 days minimum plus it's a big ask to get one person to update all 4 on their own, so 2 are preferred. Looking at 4 figs for one event for a proper 2 man update. Not only that but any event not at DTD is harder to update for a few reasons, most notably inability to identify players properly/location of updating areas/issues with TDs at important times (I've updated GUKPTs where I've been unable to get anywhere near the action on the H4H bubble, for example).
IIRC the last GUKPT you updated was in January 2008. Although I am no longer involved with the GUKPT, I think your comments are a little outdated as by the time I left things had definitely changed regarding many of the negatives you mentioned, notably:
1. Identifying players was definitely not an issue, in fact this was the first tour to give players ID cards and do full chip counts on breaks. This was in place even in 2007.
2. Updating areas at most of the events were right next to the tournament area from mid 2008 onwards
3. Any decent TD should restrict access to the playing area during the bubble, both for the players' comfort to stop crowding of the table by spectators during all-ins and so that the hand-for-hand can be efficiently managed. Press still had access but the number allowed inside the ropes at any one time was limited.
Cant vouch for how things have been managed in the last 12 months since I left, but that was the situation this time last year.