The "bass light" comment was everywhere, regarding the original Aeon C. But, along with this, most reviews really liked the sound. It was just a question of "where is the Bass".
Hopefully the new version has not been designed to overcompensate in the same way the HD650 overcompensated vs the HD600 in the same regard, by adding the same sort of "bass hump" that you are describing hearing in the A2C.
It would be unfortunate for that original AEON-C sound to be replaced by a "bass head" headphone., as that original AeonC had a really unique Sonic signature.
in not a fan of bass bloat. or bass leaning, or bass hump.
I appreciate your comment, as i'd prefer to find out about a potential flaw, vs just reading 200 posts that all seem like a Marketing commercial.
its OK to love the sound of your new headphones, and its OK if you can't stand it.
No gear is going to please us all. BUT, its always good to find out about a potential frequency situation right in the beginning of the release, as then people are going to be listening for it and talking about it, vs, just posting the typical "Honeymoon" review.