Arial Black
Adventurer
Did you generate the attack because the extra damage killed the target, or did you overkill? Cause we're not talking about competition for bonus actions - that exists outside of just GWM.
I wasn't using the -5/+10 at the time. We were fighting elite drow and they have AC 18 with a reaction to give them AC 21 against one attack, so I wasn't using the 'power attack' part.
The point is, if you include the possibility of this feat generating a bonus attack as part of your calculations of how the feat affects DPR, overkill is a thing, lack of another enemy in reach is a thing, lack of usable bonus action is a thing, and all of these things that affect the actual in-game performance of the feat are ignored in maths that say '90 damage is twice as good as 45 damage'. The reality could easily be that 90 damage is no better than 45, and the calculations do not and cannot reflect that.
I'm not suggesting that maths has no point here; I'm suggesting that there is more to it than maths.