machineelf
Explorer
So now these are a lot tougher until much higher levels when/if you get a +2 weapon ...
Yup.

So now these are a lot tougher until much higher levels when/if you get a +2 weapon ...
But a big nerf is fine if you are the DM and know this going in. You then decide how many times you put out monsters with resistance to BPS damage, and whether you're okay with your players only doing half damage.
Truth be told, especially as the party goes up over five players and up in levels (mainly past level five)... having a lot of the big weapon-users only do half damage actually makes creating encounters easier in a lot of ways. Because they are usually able to pump out craptons of damage otherwise and this actually allows the monsters to stick around a little more.