Yeah, Aldo is in a weak division, but who's to say he can't beat any of those LW guys? Has he been exposed or something that shows he can't hang with the top LWs or are you judging him based on the quality of his competition, which is a ridiculous way to judge a fighter's talent and ability. A fighter can't help how bad or good his competition at the weight he is fighting at is. All I see from Aldo is a guy who dominates the guys he fights. It doesn't take high quality opponents to see that he's one of the best in the world. I agree with you that Jones will be the more dominate fighter based on how he's dominated, but I disagree on your premise about Aldo's level being determined because of his competition.
I base it both on his level of competition and how he dealt with the level of competition, as well as his general skill set.
His compeition is the weakest in all of MMA, I think most will agree with that. Now, Penn is a small LW, he could make FW for sure if he wanted to.
How do you see a fight between Penn and Faber going? Penn and Brown? Penn and Manny? I see all first round knockouts or submissions, as would most people. Penn outclasses these guys in every which way and form, and would get them out of the fight within the first round, easily.
Now take Penn out, and put in Frankie, a guy who beat Penn twice, or Gray, who has beaten Frankie and also went to draw with him, or any top 5 LW. All of them would absolutely destroy and utterly take out the competition at 145.
What has Aldo done with them? He decisioned Faber, Manny gave a decent fight for him for over a round, he decisioned Mark, and he knocked out Brown (something Manny did in the first round). His competition is extremely weak (compared to other divisions) and although it's impressive because he has beaten them all, it's not impressive when compared to other champions, all of whom would have murdered his competition in the first round and all of whom are destroying tougher, more skilled competiton in their own divisions.
Finally, style wise he doesn't match up well with guys at LW. His BJJ isn't good enough to sub any top 5 guy, and his wrestling isn't good enough to stop Penn, Gray, Frankie, etc. Also, if he did strike with someone like Penn, he'd be lit up.
So, there are many reasons why he's overrated, and if he does step up to LW say after he beats a few more guys, he will be exposed against any top 10. That's not to say he wouldn't beat any top 10 guys, but I firmly believe he would do worse against any top 10 than he did against Mark. He very well could win, but it would not be in a dominating fashion, he would struggle some and have a tough fight on his hands. I don't see him beating any top 5, however, in fact, I see him losing quite decisively.