1)  Not enough time to convince the observers that everything is fine yet.
2)  Relatively few people are on RC5...only 140 masternodes so far.  Maybe waiting until more have updated and reported back
3)  Nervous because of previous update problems
4)  People may be unaware as you say

Personally, I'd be happy with a nice steady creep up to 0.008 and a fast takeup rate by the community.  The sooner people update, the sooner we can enforce.