PK and Bad Romance, what would you say are the main counters for Kyuremu in OU?
I'm pretty sure of them myself, but just to confirm: SR and Steels mostly, although if it doesn't hit them with Frozen World anything which is faster with a powerful STAB'ed super effective attack counts too.
-SR looks like having diminished usage. Still important but not as crippling as in the past. Anyway, many relatively comparable pokemon in the past have also had a 2x weakness and gone on to be high OU, and in Salamence's case, low Uber. The non-DD mence were typically forced to switch a lot as well, and it wasn't too crippling for it on account of its vast power. Kyuremu actually hits much much harder specially. The difference is that Kyu has very limited ability to hit steels - (although it is clear to me that offensively Dragon and Ice aren't redundant together in OU (although, yes in Ubers). There are a huge number of potential OU's which are hit SE by Ice, whilst Dragon gets few SE hits but great coverage all round. Some major examples where Ice helps: Shaymin-S, Randorosu, Borutoruso and the other one in the trio, Gliscor, Hippowdon etc etc. The right Dragon move can down some of these but both Outrage and Draco M have horrible side effects).
Anyway, as I was saying - Steel types. Forretress, Genosect, Scizor, Metagross, Jirachi all basically wall its STAB's + Focus Blast. Thats pretty much it, as Focus Blast hits other steels super effectively. Firstly, three of these, and Nattorei who has the defenses to take neutral Ice moves, take 4x damage from HP Fire. All of them share common weaknesses to Fire, a very common offensive type; all of them can be trapped by Magnezone; all of them will also be relied on to halt other Dragons. With these characteristics in mind, while Jirachi and Metagross clearly wall Kyu, none of them are going to hang around if you give Kyu the proper team support.
Ice is difficult to switch Kyu in with. Sure, thats a given. On the other hand, it can switch in on a number of common types, significantly Water, but also on pretty much any moderate neutral hit, without taking much damage. There are a surprising number of things which can't hurt it much. Its niche to me seems to be walling most water types incredibly easily, and then once its in, it can hit the switch with Frozen World and go from there. If its something it can kill when faster, great. If its not, its a Steel type who you can trap or take out as mentioned above.
I'm not trying to say its Uber. Its clearly not, unless it sneaks in at the bottom (unlikely). I just think your predictions of mid-low OU are extremely pessimistic. Its typing, while clearly not a blessing, does give it some helpful qualities as I said.
Main counters are:
Scarftar: Can switch in anything but focus blast and OHKO with SE
Natoreii: If he lacks HP fire or if its raining
Hetran: If he lacks Hp ground
Jiriachi: Wall him to no end with wish
Scisor: If he lacks HP fire (defensive version) or just ohko with bullet punch
Metagross: Survive everything and is even capable of setting up his own sweep
Specially defensive skarm: If he switch in draco meteor he wall kyuremu
The jellyfish ( dont remember the name): With good ev spreed take less than 60 from draco meteor and WoW him
This is SOME counters, he is also checked by so many things (every dragon with more than 95 spe, the four horses, roopushin, breloom, etc), and the only two on that list who magnezone traps and kill without using shity hidden power is skarmory and natoreii, both use shed shell 90% of the time for shaderaa (magnezone is not close to be considerated a threat), because defensive jriachi isnt 2hko'ed by HP fire, HP ground for hetran is awful, scisor can use u-turn (if you imply you can perfectly predict i can do the same), metagross ko with with EQ.
Dont bring the team support to say he is good, every single pokemon in the game is good with good team support so that isnt a valid point. Also you said he wall all the water types but it seems you forget boiling water, the move every single water type spam, you probably could know this if you ever played gen 5 and not just theorymoning. You are talking about the gen 5 "metagame" as you know it saying SR is less used, and that is not even close to the truth, SR is equally common on gen 5. And again you cant compare salamence to kyuremu they arent close to be the same DD, superior speed, PERFECT COVERAGE with 4 moves, more resistance, reliable recovery moves and intimdate is the perks of salamence over kyuremu, kyuremu just have stronger draco meteor and thats it (again dont use water types argument because of boiling water no sweeper have a save switch in) he have no way to beat his counters.
Ice/Dragon is more rebundant in OU than in Ubers, in OU everything than is hittid super effective by ice is severy hurted (or OHKO'ed) by draco meteor so no need for ice beam, every pokemon you named is OHKO'ed by draco meteor except specially defensive hipowdom who cant take two, while in ubers ice helps you with lugia and groundon (better than nothing). Im not saying he is good in ubers im just showing your point is wrong.
Also you said i ignore the obvius when i forgot neutrality to ice beam is a perk for kyuremu, but you seems to forget perfect coverage, intimidate, more speed, DD, etc, but that isnt import neutrality to ice beam is way better (/sarcasm). So before implying my post lacks of correct argument you should read it completly and then reply.
Also about the "god stone" i only have something to say, remember swimming googles, and if that did exist at best is just like adamant orb giving a LO boost to your STAB, and only that