You're missing out on a lot of additional information.The full interview with Bendis states, that Sentry maybe had the power to manipulate molecules and that he maybe didn't:
"I think we’ve all met crazy people in our lives, and I think you learn pretty quickly that when you’re dealing with a crazy person, you can’t trust what they’re saying to be true. Just because the Sentry / The Void announced that he had the power of the Molecule Man, it doesn’t mean that he actually did. He just thought that he did. He was a crazy person and maybe a drug addict, as the character’s creator, Paul Jenkins, put out there. So not everything he was saying wasn’t necessarily true. Maybe it was. Maybe it wasn’t."
To me it sounds like he is talking about Sentrys nature and the nature of his powers in a very general way. In direction relation to his mental illness, that is.
In another interview Bendis again talks about Sentrys powers and directly relates them to the ones of the Molecule Man:
http://www.cbr.com/storming-heaven-siege-3/
"What I’ve always enjoyed about The Void is, the character itself has all these different physical manifestations. They’re unexplained until you realize he’s got the power of someone, say, like a Molecule Man. He’s got power over physical space, but his mental illness makes it where he creates these creatures. Some people with severe bipolar disorders see these creatures in the corner of their eye, and I’ve actually known people who this has happened to. I knew someone who literally had to sculpt them into creation to make them go away. So my version of this is he is someone who, with his power, literally creates them in the persona of the Void."
Later on Bendis goes on to say, that he views the Sentry as:
"Bob is a sick man, with the power of a god [...]"
And in another interview Bendis has once again related Sentrys powers to the ones of the Molecule Man:
https://www.youtube.com/watch?v=h6AzWzxcV74
"We've now unveiled all of our cards - about who the Sentry is and what his powers are. We've unveiled in Dark Avengers #12 that the Sentry, on top of his powers, has powers like the Molecule Man. He actually has the ability to craft / to form a reality from a molecular level. And that's where his powers have come from. [...] And there is no limit to the power level that he has."
If you want to explain Sentrys main power set easily, then it's the ability to warp the reality on a molecular level.
Maybe he doesn't have the fine control over reality the way Molecule Man does it. Molecule Man used to manipulate atoms, protons even. Sentry seems to be manipulating molecules, which consist out of atoms. So he is more clunky in that regard. That's probably why Sentry needed Molecule Man to fix the city for him. But what Sentry might lack in finesse, he has even more so in power. We have seen the Sentry come out on top against the Molecule Man with raw power. And that's quite the feat, if you ask me.
But something else, that I personally find very interesting is this scan:
http://i.imgur.com/28OvvYU.jpg
Molecule Man (depowered, weakened or not) tells the Sentry, that he has never experienced something like the Sentry. And we're talking about the Molecule Man here... the guy, whose fights were felt across different time lines and dimensions. He has never come across something like the Sentry.
Which tells me, that there is something very, very different with the Sentry. He might be an entirely unique being in the Marvel universe, if even the God of all molecules can't tell what he is.
Now that might have been the reason why Sentry was able to beat the Molecule Man in the first place. Or it might not have been. As Bendis said... As a character the Sentry ****s with your mind.
I'm not that well versed with the Norn Stones, but from the research I did:
I think, that the Norn Stones grant wishes. They pretty much let you do, what you wish the most. So in a sense they warp the reality.
Loki gave the Norn Stones to the Hood, who had lost his powers before and the Norn Stones gave him his powers back.
Morgan Le Fay used the Norn Stones and Surturs Twilight Sword to restore reality (the universe?). Which is crazy, if you think about it.
And the Avengers got amped to a point, where even Captain America was capable of harming the Void.
I don't think it's crazy to assume, that the Norn Stones are Skyfather level artifacts. Prof Mc To the B to the Abe asked if they were multiversal in scale, but I think that's over the top. But as I said... Skyfather level artifacts? Very well possible.
So the Sentry got attacked by a legion of heroes, who were very likely amped to Skyfather levels. And they still weren't able to stop him properly. That's just crazy.
