I gotta say that while I've found drops, ethers, potions, and elixirs to all be pretty fuckin sweet (when properly macroed), the stat boosting potions are pretty unappealing. I'd say they either need higher stat boosts or longer durations (with preference to the former) and maybe an increased recast time to compensate. Maybe a higher-tier stat potion that uses vampire plant cuttings would be better for that, though.