With the Remaster we are doing away with spell components and are supposed to look for traits like Concentrate and Manipulate on the spell.
None of the Vessel Spells have such traits in my PDF. This must be an oversight, yes? What traits do the designers intend them to have?
Of Course, Sustaining involves the Concentrate trait, but that doesn't answer the initial casting.
In my playtesting I'm going to assume they all have the Concentrate trait (unless I hear otherwise)
This playtest is in a bit of a weird place. The Remaster rules haven't been actually released, but there is the preview conversion document and Rage of Elements that have been released with the new rules in mind.
So the playtest rules seem to have some of both Pathfinder2.4 and Pathfinder2.5 traits and terminology in various places.