I.e., the matter is clearly political, so if Mozilla lobbied the Congress for it, it'd be clearly the right thing to do. But lawsuit implies there's already a law that mandates the result Mozilla wants, and FCC is violating this law. What law is this? How comes this law wasn't enforced before 2015 - was it created later?
The only argument I find is "it is arbitrary and capricious" - which sounds clearly false to me. Even if you are NN supporter, you can't fail to recognize there is a certain political theory behind what FCC is doing, and even if you completely disagree with this theory and think it is very harmful, you can not ignore that FCC is doing this for a specific reason and not just "arbitrarily". Can someone explain to me what serious arguments Mozilla has here?