This seems to put the hype about UU Rhyperior in context, eh? With support to remove Hitmontop and friends, I could see RP Aggron becoming BL/OU.
I really don't have to say it again but Aggron is just hype. If it does make it into OU, it will probably stay there though, since fanboys now have an excuse to use it over Metagross or Rhyperior (it doesn't matter if Rhyperior is UU, it's a lot better than Aggron).
Aggron's typing means it can be revenge killed by every revenge killer out there (ScarfMence, Heatran, Weavile, Gengar and Starmie come to mind). It could get a kill, mostly because Head Miss is actually strong, but I doubt it can faint more than one Pokemon in a match.
I don't like Miss Edge to begin with, so I'm slightly biased here. Aggron could do well in UU though, I can't deny that.
Head Smash KO's Breloom ;).
When Garchomp becomes OU, Aggron usuage will decrease faster then its increase.
I like the use of 'when' and not 'if'. Though I have no comp so I can't exactly comment on Chomp becoming OU again.
Even if it did, CB Outrage is easily taken by Aggron, allowing it to RP or sub.
Aggron wants to attack. It has no business trying to Thunder Wave anything - leave that to defensive pokemon like Celebi and co.
I'd like to contribute a tiny bit to the Rock Polish set.
1. The set does not need 252 Speed, only 248, and will outspeed everything exactly the same. 4 Extra EVs for Special Defense.
2. I've just run it over a little bit, and from what I see, people are neglecting that after a Rock Polish, Aggron outspeeds everything without boosts up to Base 130 Speed. Then, with +Speed Choice Scarfer/Any other way to ger +1 Speed on, Aggron outpaces 252Spe Base 70s. This means that you can outspeed Choice Scarf Metagross, which would've been a solid counter otherwise. Then with Neutral Speed, The fastest thing you'll outpace is +1 Gyarados. Gyarados doesn't really matter anyway, considering that no matter how Bulky you make Gyarados, it will just plain die to Head Smash.
3. Rock Polish probably has the best chance of being the most viable of the sets because after the Speed boost, you're talking Bronzong Hippowdon, Skarmory, and Choice Scarfers as reliable counters in the current metagame. Aggron has so much potential, especially with the Rock Polish set. Head Smash may be the new Bullet Punch one day.
Then again, everyone might start using Vacuum Wave Infernapes, and ruin the fun.