my 2 influence on the matter based on: QoL arguments and also some historical points I looked up.
my opinion:
QoL: like extra slices of birthday cake when i'm full, and I would like more... but cannot eat it.
historical sake from paragon wiki, this was advertised as a 'temp power buff' and it's duration was advertised as 15 minutes (60 minutes actual), with timer starting immediately upon crafting... as compared to currently advertised duration of 60 minutes (90 minutes actual). so, this has already been boosted whether for QoL reasons or not, I do not know. To note, both the historical and current versions of the empowerment buffs, they cease to work after a player defeat, though the timer continues to persist.
boosting this through stacking/buying multiple recipes worth or possibly other methods; would imho opinion turn this into a 8 hour power and change it's classification into the realm of a 'daily power buff.'
For these reasons, do not agree w/this proposal.