Given that this game is supposed to be based on Germanic folklore and culture it really should have more varieties of beer, at the least their should be barley and some location based variations much like cheese. Different FEP mixes from different varieties would make it useful too as Charisma is a near useless stat and will probably remain so until their are NPC's that can actually be influenced by it.
And what about apples and nuts, since those are now 'finite' and since you get FEP's from picked berries, chantrelles etc., should apples and nuts not also give a small amount of FEP (the new decimal system should be able to cater for small amounts nicely now)?
Back in the day when I was working hard to raise my stats, wine was the only way I could reasonably get my charisma up, and it's difficult to store in large quantities because it turns to vinegar in barrels.