I don't know if this counts as a bug or a feature request. I'm using BG2EE on a Mac with RR 4.71.
In the EEs (I don't know about the originals) all +X/+Y vs. Creature weapons have an enchantment level of +Y. For example, 'Kondar' the Bastard sword +1, +3 vs. Shapeshifters, counts as a +3 weapon. In RR, these weapons only have an enchantment level of +X. Notably, my Stonemasher +4 vs Golems can't hit Iron Golems. I propose that you give all the +X/+Y vs. Creature items added by the mod an enchantment level of +Y to match the rest of the items in the game.
Items that would need changing are:
Stonemasher +2/+4
Stonemasher +3/+5
Stonemasher +4/+6
Silverblaze +3/+5
Trollmelter +2/+4
Keeper of the Law +2/+4
Keeper of the Law +3/+5
Blindstrike Bow +3/+5 (This doesn't really matter given the way bow enchantment works.)
Thank you.