Ceratinly. Evilbry's was a great idea. Would allow for slightly faster progression in composing levels and be a big sink for the frags. I did a quick calculation on how long my current supply would last after the global event and given my average of ~7 20xp pots a day then I likely don't need any more frags until into next year. If I could turn a 20xp into a 30 xp for an extra 18 frags (or even more) then I'm right in there. And why wouldn't I just make a 30xp in the first place - a) more than twice the price and the composing time is far more which is big issue. I want to keep the gold cost down to something reasonable, don't want to have to wait forever to make a potion, and would love to progress a bit faster. This idea covers that.
Alternatively, cut the composing time to a flat 1 hour for all potions, but with the same instant finish parameters. That should also create a frag sink.
Dave