I would like some better surveys for alchemists. At the moment all we've got are flowers (did they use to give 2 before or was it always 4?).
You could have:
Growths which provide multiple mushrooms.
Nests of spiders / butterflies / torchbugs
Maybe a dead animal with fleshflies
A dirt/sand mound of mudcrabs / scribs
Nightshade seems to have been ignored too but that can just be another lush flower if added.
Obviously, I'm not suggesting all alchemist survey sites have all of the above, but it'd be nice to mix it up a bit and include the other reagents instead of just constantly flowers.
Also, I guess you could include a good water source or a poison satchel for the solvents.