It should be noted that all existing HP and MP recovery potions have had their effects increased and recast timers decreased.

Potions are now twice as effective with 3/4ths to 2/3rds their former recast times.
Ethers are now ~50% more effective with a 30s shorter recast timers (X-Ethers have a 60s shorter timer)
Elixers follow the Potion's and Ether's effectiveness increases (x2 HP, x1.5 MP) and have lost a minute off their recasts.