Yes, rolling back to 8.1 is not a permanent fix: after a hard reset, the same issue will surface.
As I've already posted on another post, all recipes (soft, hard reset, turning on yourself 3 times, touching 950 times a Daniel Rubino's portrait etc ^_^) are superstition. When the store team fixes the issue for let's say 640, all 640 will see these apps update all of a sudden. Including the ones who haven't hard reset 10 times.
Of course, in the meanwhile, the rollback to 8.1 will work, but it's not worth it : several lumias have been "cleared" since Wednesday.