Both good points.
Solvent removal is sped up by the vac. Decarb temps are not going to be reached under vac till you’ve gotten rid of the solvent. You may be doing them in the same vessel, but simply calling the combination “decarb” without stating that it’s also “devol” isn’t getting the message correctly (audience dependent).
Absolutely. Agitation is very helpful in getting heat input distributed, which definitely speeds things up. I’m not sure though if vacuum makes stirring less messy or stirring makes vacuum less messy. I believe it can go either way. Think unstirred jar in a vac oven….bump!
See: Decarboxylation under Vacuum? to explore