Personally don't want to be forced to go to the market to buy potions for group content, which I know sort of craps on the alchemist gold mine dream but yeah lol... Don't want to be like "you dont have a hi-elixer of gank!?!? WTH!" get out of Satasha Hard Mode! lol

However, perhaps for fun and gift for crafters they can add bonuses and passives to things like open world content and solo content. So like regen mp/tp during combat for one hour, immune to poison and extra exp two hours, 10% movement speed boost and mount speed boost when sprinting, double sprint duration etc etc. Very powerful open world/solo potions. The far more easier route would just be like "in open world and when solo, potions are 50% more effective". Solo = unsync'ing dungeons, with squadron, chocobo, etc.

Also something I feel really lacking from alchemist (and other crafting jobs) consider making some for fun, Like potion that gives you 75% reduced fall damage and double the height on your jump, water walking, shape changers (frog potion?), size modifications, etc. Not really "goof" but bottomless and cauldrons are pretty cool imo (cauldron/shareable = you use the item and then an intractable object is generated that everyone in your group can enjoy as well, like perhaps giving carpenters a portable campfire and stools).

The fun potions (again for other crafts, fun things too) could be more gil, and even the open world/solo things can be still useful too. But I just don't really want to see normal content that I need to go buy a consumable (I generally dislike consumables as a whole, although I do love bottomless potions - would buy that).