Upgrade your computer It lags so hard on my Laptop, but not on my New Pc.
Same thing for Book 1. Most of us experienced lag, but the new comps destroy it.
I actually find the game easier with this rule intact.
It disables the fact that you're dying. If I save when I'm near death but can't be bothered continuing, when I reload, I might be too far or forgetful to heal myself and die.