Shard O'Glase said:
Mike's here maybe he can bust out some math to show what kind of damage bonus you need in order for a rapier to beat out a long sword, and a falchion to beat out a two handed sword, before and after this change.
Sure.
Falcion/Scythe vs. Greatsword.
Each gets one bonus to the crit range, meaning that the Falchion/Scythe is doing 1.3 times damage due to crits, and the Greatsword is doing 1.2.
1.3(5 + x) > 1.2(7 + x)
6.5 + 1.3x > 8.4 + 1.2x
.1x > 1.9
x > 19
So if your damage bonus is 20 or higher, against an opponent that's susceptible to hits, all else being equal, it's better to use a Scythe or Falchion with Improved Crit than a Greatsword with Improved Crit.
Hvy Pick/Rapier vs. Longsword/Battleaxe
Again, 1.3 times vs. 1.2 times.
1.3(3.5 + x) > 1.2(4.5 + x)
4.55 + 1.3x > 5.4 + 1.2x
.1x > .85
x > 8.5
If your damage bonus is 9 or higher, blah-blah-blah, rapiers or heavy picks are a better choice than longswords.
Hvy Pick/Rapier vs. Bastard Sword/Dwarven War Axe
1.3(3.5 + x) > 1.2(5.5 + x)
4.55 + 1.3x > 6.6 + 1.2x
.1x > 2.05
x > 20.5
This one isn't pure apples-to-apples, of course, a bastard sword being an exotic weapon, but with Dwarves getting martial proficiency in war axe, I thought I'd run it. No comparison, here -- you need a damage bonus of 21.
I suspect, but suck at math so can't confirm that you need in the +10 range of bonus damage for the stackable crits style before the falchion or rapier overtakes the twho hander and long sword. And its probably more like +13 damage bonus after this change.
Actually, it was 13 when they were stackable.
I'm not a big fan of the no-stacking change. While 12-20 crits were obnoxious, they weren't overpowered.