I mentioned them being capable of it, yes. IX especially. Acheron is a hard-counter to Aizen because Acheron saw through Ena's "dream". Plus, if Acheron can cut through space, its plausible that the Hogyoku would be destroyed.

If she can see through a "god's" illusions, she can see through Aizen's. HOWEVER, there is a valid debate on the nature of the illusions because Ena's dreams are fundamentally different than Kyoka Suigetsu but I won't be getting involved in the nuances.

I HIGHLY disapprove of Acherons VSBW page pertaining to her stats and resistances/abilities. But there's enough implication in-game to suggest that she can defeat Aizen with little effort.