I've noticed that even with all this HO hype around, bulky offense has become more effective as well. Chesnaught, Rhyperior, bulky Latias, Sylveon, Conk, Specs Mag, etc. all have their uses in the meta. Many of them run significant HP and/or Defensive investment, but still boast the ability to deal solid chunks of damage. A lot of this might go back to the post-Aegi meta evolving. Take Chesnaught for example. Tank Ches can afford to run Wood Hammer and/or Hammer Arm, which allows him to deal with the TTar-Exca core, +1 Mega Gyara (even with Ice Fang iirc), +1 Mega TTar, Landorus-T, Terrakion, SD Craw and a bunch of other hard hitting things. It OHKOs or 2HKOs them all back with no investment, except for Lando-T, who it outlasts (especially with some Leech Seed and Spiky Shield stalling). Similar reasoning extends to Rhyperior, Sylveon, Conk and a few others. Most of them don't have textbook reliable recovery, but they have means of recovering some health, be it Leech Seed, Drain Punch, Wish-Protect or Lefties.
With regards to stall and the offensive explosion going on, I think some of it goes back to Mega Evolution in general. It's tough for stall to cover everything when Blastoise and Aerodactyl are considered weaker Megas, and they have 135 in their offensive stats! There are at least a dozen Megas running around with at least 150 Attack or Special Attack. ORAS is just going to bring more. That's before we get into other stall-wreckers like Lando-I, Taunt LO Gengar, Kyu-B, Keldeo... There's so many things running around with absurd attack stats, ridiculous attacking and boosting moves, running Taunt and Subs, Choice items slapped on them, buffed Knock Off, and nearly unresisted STAB combos. There's a certain point where the power creep just becomes too much to deal with to still be playing totally defensive. I don't think a few bans will fix it either. There are at least 5 Megas that really screw with stall just by existing, and that's before we get into things like Taunt MegaZam, 3 Attacks+SD Mega Scizor, and Stallbreaker Mega Houndoom. So that's my mini-rant on that.