You know, it's possible that a vast majority are passing the kiosks by completely and only doing stand by... That could be for many reasons. Maybe they don't know what it is. Maybe they thing they aren't allowed to do it. Maybe they don't want to slow down to figure it all out.
I have no idea... But it's possible. If there's one park that you could do that with and not ruin your day with waits, it's AK.
But this happened with FP too.
DAK is an excellent choice for Disney to first experiment with FP+ for offsite guests.
It has only a few attractions and its headliners, KS and EE, have huge capacities. It also has considerably fewer visitors than MK or Epcot.
The problem with FP+ is that the user interface is more time-consuming to use than FP.
With FP, it's a matter of looking at the posted return time, sticking in your media, and waiting for your paper FP ticket to print. For each person, using the interface usually takes no more than a few seconds. (I usually could get the 6 tickets for my family in under 15 seconds.) So, even if there were a dozen people ahead of you, the line only took a few minutes.
With FP+, the interface is a lot more time-consuming to use. It's a matter of deciding which attractions to chose, planning out when to visit them, and then hoping those attractions and times are available. It's more akin to ordering food at a WDW restaurant, with the additional caveat that the food you want might not be there by the time it's your turn to place your order.
FP+ helps avoid backtracking between attractions but it also limits us to 3 FP per day and only at one theme park.
FP+ requires preplanning. Many will like that; others will dislike.
FP+ also has attraction tiering at Epcot and DHS. That most definitely stinks.
As a whole, FP+ is not better or worse than FP, just different.
However, if offsite guests also have to wait in long, slow FP+ kiosk lines, then FP+ is decidedly a step in the wrong direction.
Let's hope offsite guests eventually get to pre-book their FP+ too.