I don't think the hypnosis allowed him to stop the swords with his bare hands but it's true lots of people can do that. The way I look at it though it's the ability to win fights with the least amount of effort, not the ability to win fair fights, that determines ones 'ranking' on the power scales. As hax as it is hypnosis is part of Aizen's skillset just like Ichigo's 'super' speed or Tousen's or Mayuri's bankai are part of theirs. It seems like as long as Aizen is strong enough to cause devastating damage to his opponent with a free hit his hypnosis should guarantee him at least one chance to do so. I think what would matter most would be whether his opponent was able to break through the hypnosis to react and counter his free hit and whether the free hit was enough to take out the opponent in the first place.

We know that Shinji was able to detect and dispel Aizen's illusion without any effort 110 years ago. If he could do it I figure the captains as old or older than him probably could have as well, but that was then and Aizen may have improved or been hiding the full extent of his ability even then. In the present timeline Unohana, apparently the most experienced captain after than Yamamoto, seemed fooled enough for Aizen to have gotten a clean attack in on her at any time he wanted. I would expect the hypnosis to fail on Yamamoto just because, but Ukitake and Kyoraku I would put below Unohana in terms of experience and mental discipline and I'd call it a toss up whether they would be susceptible to it since we don't know what special abilities they have.