It's hard to think of any balance changes for a metagame I haven't played in, but I have another suggestion, concerning Zoroark. It's pretty shitty of me to ask for more changes after seeing it receives a ton of buffs, but there are 2 things i'd like for specifically for Zoroark.
1. Increasing the BP of Night Daze from 85 == > 95. My biggest issue with Dark types like Zoroark and Weavile is their low base power moves. Dark type moves typically cap out at 80 BP, which seriously limits their ability to do damage. Need an example? A Dark Pulse from a Zoroark can't even 2HKO a 0HP Garchomp without a boosting item. At 95 BP, you're guaranteed to do this after SR damage (ie, OHKO at +2). A stronger Night Daze also let's Zoroark actually OHKO most dark weak Poemon specifically bulky Mew, Deoxys-D, Reuniclus, etc, while its current form of Dark Pulse / Night Daze either barely pulls it off (you need to run Choice Specs + Night Daze to even have a chance of OHKOing 0hp Deoxys-D) or just fails period.
2. Aura Sphere included in its learnset. Focus Blast is a decent coverage move, but the awful accuracy really screws Zoroark over if it misses, since it goes down if it takes a hit. Aura Sphere is a cool alternative and Pokemon like Mew & Togekiss have shown us that Aura Sphere's lowered BP offsets that perfect accuracy (It baffles that this move is semi-exclusive, seriously GF wtf). I feel like these are the biggest changes that Zoroark needs right now.
In fact, I wouldn't mind seeing Aura Sphere handed out to several Pokemon who rely on Focus Blast as a coverage move.
EDIT: One of the only reasons to use Haxorus over other Dragons is Mold Breaker EQ is Haxorus, don't take that away :(