Current state of Wizard Slayer

OK, so I know that the class is being patched such that it bestows the spellcast failure chance upon melee and ranged hits, but what is the state of this in BG:EE and BGII:EE? I get the feeling there's currently a disrepency. Also, I'm playing on a Mac if that matters.
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Comments
http://forum.baldursgate.com/discussion/24181/wizard-slayer-rebalancing-for-bg-ee-and-bgii-ee/
Or you can play without the mod also...