They're all higher hitpoint because they have much lower armor class, for two reasons: burning surfaces instakill 7hp goblins and normal AC goblins wouldn't be hittable from lower elevation by low level parties with the system larian has introduced
Are you sure about that?
Isn't it more likely that their HP is directly related to their class and level? Also their armor dictates some AC, some aren't wearing any, their Ac happens to be lower.
Where is your proof that they raised goblin HP because of surfaces?
