At first glance, it does not appear that the Enduring Benefit Arcane quirk affects the duration of tiers. The Paladin buff aura of honor lasts 1200 rounds with and without enduring benefit 1/5 enabled.
Would you consider making enduring benefit work with non-primal disciplines as well if you didn't already?
Enduring Benefit bug
Re: Enduring Benefit bug
I'll check on that.
Regarding old discs being affected:
Unfortunately, the old style effects have no internal mechanics to support such things.
Regarding old discs being affected:
Unfortunately, the old style effects have no internal mechanics to support such things.