GF is actually makes a whole lot of efforts to shut down HO in this generation, priority is just one of the solution given, the nerf to special moves(which is much easier to abuse than the like of CC) and the defog buff also aim at hitting HO teams, and oh how can we forget about the weather nerf? Also, the introduction of the Greninja, Noivern and Talonflame which all have their speed hanging sky high to 120s is another solution given, outspeeding everyone but does not hit hard enough to get through the walls. This is however shut down by priorities though so we are actually seeing decreasing popularity besides Talonflame. Another solution given would be spider web, but as usual the distribution is so poor to be effective in our OU meta.My opinion of Gen 6 is twofold:
Gen 6 is the Generation of Priority; and this has some surprising effects; such as making slower; bulky attackers better than before. Having all the speed in the world isn't that important when there is Scizor; Azumarill; Talonflame and Ageislash priority-hitting everything with either incredibly powerful attacks or incredible attack stats. Priority shapes this metagame. Those 4 pokemon shape the metagame.
This is made even more notable by the fact that all 4 of these pokemon can set-up. Swords Dance for the Steels; Belly Drum Azumarill and Bulk Up/SD Talonflame. Hell; a case can be made for things such as SD Adaptabilty Crawdaunt; SD MegaPinsir and of course; while banned now; PuP MegaKhan.
Gen 6 is far more enjoyable than the weather wars of Gen 5. I can only imagine Gen 5 OU without the weather; and swamped with less priority.
Stall is as dead as it was in Gen 5; the complete lack of assistance to Stall and Stall Mega-Evos sealed this. When the best thing stall got all Gen was Klefki you know it's bad when Offense got things like Talonflame.
The meta is very physically based since physical bulk is required to survive the priority. Special attackers seem to catch people off-guard in fact. I've been running an offensive LO Espeon with great effect recently; because no-one seems to expect it. They all think 'Duel Screens so set-up priority user can come in'. Nope. And that Espeon just took out 2 of your team.
At most I see 1 special attacker and 1 Mixed Wallbreaker or Utility-Special Attacker [Like Rotom-W].
Due to the heavily physical nature of the meta; the high amount of priority; and the resulting reduction on speed emphasis; Burn has overtaken Paralysis as the most common and crippling status condition. Whereas before special attackers would make Burn spamming less of an issue; the physical nature of the meta means few special attackers are being run now.
Also the nerf to special-moves dosen't help special attackers.
Also this isn't a HO Meta; it's a BO Meta.
To conclude, pure HO teams are basically dead now, but HO team does have some new toys to play with. Strong priority users can be usable for HO teams, and the community also balance the game by releasing Deoxy-S(at least for now) and drizzle SS. Plus as usual there are always some strange yet effective counters people created, which in this case, will be things like Defiant Bisharp, Spiderweb Defog and you got a +4 ready to sweep you team.