On pg 95-97, the Thievery talent tree lists an "Obscure Trail" talent (pg 96), but it does not show up in the following pages. Instead, on pg 96-97, there is an "Underworld Lore" talent that does not appear in the talent tree.
On pg 92, the Witch Hunter talent for sorcery: the Protective Superstitions prereq is bolded. Also, to clarify the talent's effect, when it says, "If successful, you gain 1[CD] extra Cover Soak against your foe’s attacks and powers", is this referring to the entire opposing side, or just the sorcerous opponent?
You have stated it in the skill's description, which points to the single professions direction.
Having 1 skill is ok, but having multiple professions within the talent tree seems weird for me.
I would go for the following approach, the skill crafting should be broad within a single profession, like smith, carpenter, mason, cook ect., then players can specialise or gain utility by the talents.
Its not a problem if you have more or less generalised talents for this skill, but they should be only affect 1 profession at a time.
Having the 3 basic professions in the core book is ok, you can add new professions in the upcoming expansions if you feel like, and if you have a "dummy talent tree" then it won't require much work.
Even players can create their professions if they have a clear view on the talent tree.
The sweet spot is between the 1 skill does it all unless the GM says no and we have a skill for every profession's every specialisation's.