I cannot seem to find the reference to these weapons in the release notes. I know I read a while ago they being handled the same way as vorpals for their damage (the 100 over 1000HP, etc garbage), but I cannot remember if they are supposed to be only working on a 20 now or not. I tested the Shav side of the vale on my rogue with dual banishing rapiers and there is a huge difference in their efficacy. On live server, I crit on a 15 and it takes usually 2-3 hits to kill a monster (to get the roll I need and they always seem to fail their save). On Lam, it would only proc on a natural 20. I'd get the 100 vorpal dmage and they still seem to always fail their save, but there is a huge difference in the amount of beat-down required until you roll that 20. My guess is that the 100 damage (while superfluous here) is always applied to a 20 so it hits when mob is >1000HP. On an assassin 3 with a radiance weapon getting SA, there seems to be no reason wasting pack space on smiters and banishers any more. This *really* sux for disrupters where there is no SA.
Do these weapons need this big of a nerf, really? Going from a 1 in 4 chance to proc to a 1 in 20 is ridiculous. Why not leave the threat range the same, just increase their saves a bit so it will proc the same, just won't take the effect as often? Some kind of happy medium.