I spoke with cowboy and he requested I post about foraging experience and alchemy for the developers to see and hopefully sort out or give a definitive answer as to why things changed.
With each level gained in foraging you receive one less experience per pick which seems rather strange. (Example: If you get say 30 xp per pick at level 14 foraging, when you reach lvl 15 foraging you would only get 29 xp per pick. That isn't the exact experience it is an example to show the decrease in xp per pick.) And the experience in foraging decreases with every level you gain while picking same types of resource.
Today I reached level 16 in alchemy and my foraging was still at level 15 (and on the low end of level 15) which sent me back to pick apples and other items I did not need to gain the level for foraging next items. Is this an intended outcome? Seemed rather odd that the experience for one was so much lower than the other and actually decreased when I leveled rather than increased. It almost felt like a punishment for gaining a level.
Also, at Mythos we use to be able to gather the level 16 foraging items. Now all are replaced with level 24 items. Where jootberry's, swamp fungus, and nidaberries were are now cherry trees, andreas plant, and raspberries. Now most of the lvl 14 foraging items are on the crystal coast (very few there) and at Littlehold (tons at Littlehold) There wasn't much at Nidaros either.
So those were my observations over the past couple days while foraging and leveling alchemy.