I was talking to Scott Gaines one day and he went on a rampage about how Bitter Rivals has gained so much power and should be banned. It raised hell during it's release about making all your attacks a certain zone, but now he says it's amazing cause it can discard much more cards due to the new keyword abilities. Also, none of the new anti-discard actions have keyword abilities, so they cannot discourage Bitter Rivals.
I was talking to my brother Chubbs the other day and we came to the conclusion that Bitter Rivals actually lost power. Your opponent can now ditch their Plasma Beams to keep ahold of their Spikes. They can discourage it with Big Cyclone because it has the Ranged keyword. They can ditch cards with Unique in their hand because they already have one out. Your opponent just gains more options to dodge discarding their precious keyword abilities.
Hanover's conclusion - Bitter Rivals became more playable, but lost a little power. Making your attacks certain zones to push through damage is still golden just like it used to be, but nowadays you gotta get rid of those Spikes, Menuetts, Reppas, or whatever killswitch that has a keyword ability, which is pretty much most of them. It does screw over the Combo archtype, but you if you are running a Combo Archtype then should be playing stuff to deal with Bitter Rivals.