The 15-second duration isn't that awful. Consider boss mechanics like the Infernal Nail; there are times when you need to crank out a quick burst. Odin and Zantetsuken (sp?) you have to bring him down quickly right at the end. The shared cool-down between restorative (HP/MP) and stat potions seems unreasonable though as they are so different in application. You also need to take into account that potions of any kind _should_ be powerful, they're consumables after all. Potions should out-stripe CD abilities because we have to throw so much money/time at each use.

That being said, the material cost of these consumables really does need to come down some. Larger batches and smaller requirements. Let me be clear Square- your potion system is balanced and working as intended when a large portion of the player-base uses them. Both in the 1-49 and endgame content. As it stands I just don't see that being true. You don't need to hit 100% required but 30-70% would be nice.