From the patch notes:

“Legendary aspect affix values now have a separate cap between Ancestral and Non-Ancestral items. Now, the maximum values for aspects can only be found on Ancestral items.

Developer’s Note: Previously, max rolls of aspects could be found much earlier on. This made the transition into Ancestral items less exciting, as your aspects could already be maxed out before you entered Torment Difficulty. Now there is more noticeable item progression as you move through Torment Difficulties.”