Yar. Told you all the real version of the spell is actually better in most respects.
And, as far as I can see, using potions in Tenser's shouldn't be a problem as it should still be possible. You just can't cast spells or use scrolls, since you're amp'd up like a gear-head on his last rock.
I imagine the not talking to NPCs is due to a silence effect? You shouldn't be talking in Tenser's anyway. You should be killing. I haven't checked if people can still use the metamagic feat for silent spell. If so, it's only a small error.
I actually haven't noticed any other problems with the new Tensers, other than perhaps the scrolls, and it seems to almost directly imitate the book version. Good job.