2014-11-24 : Gaining control of a creature doesn't cause you to gain control of any Auras or Equipment attached to it.

2014-11-24 : Mob Rule can affect creatures you already control or ones that are already untapped. It will untap them if applicable and give them haste.

2014-11-24 : Once you gain control of a creature, it doesn't matter what happens to its power.

2014-11-24 : You choose which mode you're using as you cast Mob Rule. Once it's cast, you can't change its mode, even if creatures' powers change in response.