Just like I mentioned on an almost identical post like 3 posts above Alchemy and SC were added with the SI expansion and while tweaked in certain ways for some QOL, Phoenix isn't going to gut one of the tradeskills like this (removing buff pots). You can rationalize it a thousand ways but buffpots are here to stay, people have had this argument out during several months of beta, nothing above here is a new argument that wasn't already dismissed by staff, wrong hill to die on here. At best I'm hoping they would maybe double mat cost and move up to 20 min but even the 10min is fine and later on everyone will get omnibuff pot anyway so all I can say is that it gets better.
They aren't going to remove it, and it's a false dichotomy to say increase it or delete it, it can be the current or other durations without removing it. Everyone is buying and using them so it isn't some unused, neglected thing.
I think its best everyone realize it was like this all of beta, staff have heard all these arguments for months, and no changes have been made, there's your answer.