ok, I'll give you the torch bit. thats a utility point that I hadn't thought of as an exception. I think in my mind, its more that you stash(whatever means applies) your offhand "thing" and hold the torch when needed... but the torch itself not exactly counting as an "offhand thing", but rather a utility that simply has to be held in the off hand.
and I'm not sure I buy the minimum equipment lighter movement thing. a buckler, dagger, Main-Gauche, whatever... would not necessarily be burdensome, and the practical usefulness of it, (if you don't have to be holding a torch or something) would outweigh its... erm, weight.