Gengar probably enjoys this, getting STAB special attacks is kinda nice. It also gets an even stronger explosion, although it might have more issues with Blissey. Meanwhile Swampert trades his stronger Earthquake for a stronger Surf, although he does get physical Ice Beam.
Most pseudo-legendaries adore this overall. Dragonite and Salamence get physical STAB that's not hidden power, and can boost up with Dragon Dance. Adding on to the fun Fire Blast is physical too, meaning that after a boost it'll be pretty hard to actually stop them. Tyranitar meanwhile trades in its Rock Slide for Crunch physically, although Crunch now suffers from lowering the opposite defensive stat (although Shadow Ball has a better secondary effect probably), and also has a now-physical movepool that's pretty good. Metagross doesn't like this nearly as much though, as it trades in its Meteor Mash for the weaker (but accurate at least) psychic, loses its nuclear Explosion, and overall just has a very shallow now-physical movepool aside from Hidden Power of only 5 moves. One of those is Confusion, for reference. Losing EQ and all its other moves hurts.
Oh yeah EQ is special, making it much less useful on so many things. The vast majority of Pokemon that learn it have higher physical attack, although I suppose it does slightly help out the much worse Latis and the very nerfed Kyogre up in Ubers. Speaking of Ubers, Groudon's now got a physical Fire Blast and Thunder(bolt) to make up for a worse EQ, as well as enjoying the benefits of all its weaknesses being physical and having to get through the much more impressive 140 defense as opposed to 90 special defense. Ho-oh also enjoys getting physical Sacred Fire, and Rock being special means it has a much better chance to take those hits.
Back down in OU, Gyarados seems more threatening. Dragon Dance backed up by physical BoltBeam and Hydro Pump is a much better prospect than HP Flying / EQ. With water becoming physical Azumarill might maybe be able to become relevant, although the odds of it aren't great, just better than the zero they are.
A lot of things end up losing out on a strong STAB and instead have their random previously-special coverage moves buffed. Stuff like Starmie I have no clue what the plan is, since all its now-special moves except for hidden power are normal-type attacks. Spin is nice but not so good people are going to put up with that. Flareon gets physical fire moves and sneasel gets physical ice and dark type moves though so it's all worth it.