Really though I thought the theory was to allow 5 full range (bass too!) and a single dedicated LFE, at least for HT stuff. I see no big problem with this as long as the recording engineers don't assume a 5 sat/1 sub system and downmix or limit the '5' for us at mixing time. I always thought of the .1 as a 'boom' channel for HT, and also in systems where any of the '5' are not bass happy it is a possible place to steer that excess baggage, but I would hate to think someone is intentionally limiting the '5' part 'at the source'.