Two herbalism crafting station are already available close to degannwy, one being in the sewers and one just outside of Vallaki near the lake, both are reachable in about 3-5 minute from Degannwy. Adding yet a third cauldron in the area wouldn't serve much purpose in my opinion.
The place where elves and marginalized people can go for herbalism is the sewers at the moment, and Degannwy isn't really intended for that kind of stuff either, while the sewers are perfect for outcast, elves, orcs and everyone the locals do not like, which makes a suitable place to have an herbalism station.
A tailoring station is already available in Degannwy on the second floor.
As for leatherwork and smithing, I don't see them fitting too well in Degannwy. For people who can't use the smithing crafting station in Vallaki due to IC reason, Dvergeheim would be the place the go. As for learther working... I'm not totally sure, but I think there is an other one not too far...
If a Dev wants to take up the project the Gaurdians of Degannwy could probably come up with a few suggstions for imprvements, but I suspect Degannwy is low on their list of priorities.
Feel free to send me or an other Dev a PM with suggestion if you'd like to, we're always open to suggestion. You can also contact me on Discord if you'd prefer