I understand the point of giving 10 hours of rest prior to a "forced" assignment that you weren't expecting. However, if a company wants to call you (they get one call that isn't considered interrupting rest) and let you know there is a trip available to pick up that departs in 3 hours, I don't see the issue. Instead of forcing it upon you, they offer, you accept, everyone's happy.
There really is no change from the companies perspective. If you didn't want to do a JA you didn't answer your phone. Now, you do answer your phone and say, "give me 10hrs."...NEXT