Removing that change is a simple matter of unchecking the box then clicking "Apply chosen patches" again.
If that isn't working, I suggest making sure BTB's plugins are loading last.
Done all that and still the same outcome. Tested with both a new game and my old save.
I'm using Seydan Neen and the cave opposite its Strider as a test - as well as the Dissident Priests temple: Hollo-something or other. The Imperial Guards in Seyda Neen attack as you'd assume, with their weapons. The citizens all whip out the paralyze spells. Of the 3 enemies in the cave opp the Strider, two constantly use paralyze spells (hide behind a post and they'll do it for ages) whilst the mage acts appropriately - drain agility spell before drawing his weapon. Oh and this paralysis barrage extends to the Immersive Chargen opening riot scene. I've seen footage of them all punching/stabbing each other online, yet in mine the dark elves are awfully insistent in attempting to paralyze the guards. The Dissident Temple was a mixed bag. The more 'generic' NPCs again whipped out the paralyze spells, but Ms Milo and the leader of the Priests all used more appropriate methods of attack.
I'm guessing I have a conflict with another mod, but I can only think of Darknut's Greater Dwemer Ruins (as this barrage of paralysis extends to the dreamers as well) which may have affected how NPCs attack. Pherhaps a quest mod?