Yes I agree, and I regret that some scientific papers doesn't seem to make any difference between Low T3 state and Low T3 syndrome.Being in a low T3 state could be very different from low T3 syndrome.
Found this when looking at adrenals - scrolling down to low thyroid function and it seens to be saying the same re hypometabolic state, but looks at it a little differently.
Not a scientific paper but i found it interesting
Do you have any links to these studies on Fibromyalgic patients by Dr. Lowe? I also wonder if he was only prescribing them T3, rather than a combination of T4 and T3 which might stymie the usefulness of the T3.