The problem might be that it isn't a percentage at all but a set number between 1 and 3 (at least I seem to remember it was this way initially). Which works for small POIs but might not scale up to tier5 buildings.
Well that would certainly explain it. Hopefully someone in charge can take a look and maybe see about balancing it a bit for the bigger POIs / higher tier quests. I'm seeing a lot of frustration regarding this issue. Thanks.
