PHB text is similar?
When you take the Attack action and attack with only a glaive, halberd, quarterstaff, or spear, you can use a bonus action to make a melee attack with the opposite end of the weapon. This attack uses the same ability modifier as the primary attack. The weapon's damage die for this attack is a d4, and it deals bludgeoning damage.
As I read it yes, it should apply Str ability modifier. Not sure about Cha in case of Warlock, cause you may assume the end of the weapon is not bound like I did (hard to say if intended or not). I also played a Warlock. Damage seems to be fixed, no damage riders normally applied to main attack. Agan, a full second attack would have been too much in my opinion, considering you get this bonus each time (on top of the opportunity attack chance).
Well, this is how I made peace with my playthrough at least.
Last edited by Wizbane; 14/11/23 07:01 PM.