Ident
Good discussion point.
As the PIC, one is primarily responsible for the safety of the crew and pax..
The overriding consideration should be.. Is it safer for them to remain on the aircraft or to evacuate?
Confirmed fire..yes, evacuate. However, smoke only?
One must consider that there is a strong possibility of injury or death during an evacuation using slides.
Utilise all external assets to confirm the status of the emergency and remain onboard if safe ('GRADE').
Imho, an evacuation is the absolute last option to be taken here.