* Heart-rate (not sure what else?) being equally affected by decaf and regular coffee
* Impaired cognitive effects from drinking far too soon after initial drinking (and as measured by BAC)
* Reduced stress hormones when arm is placed in an ice bucket after taking a placebo and being told it's morphine
* Physical nausea including vomiting after being told potential side effects of a trial "drug"
In terms of the body "healing" itself, I can see how the placebo effect could be attributed to other things.
I just did some of the obvious Google Scholar searches on some of the issues you mention, but I'm not seeing clear statements of these findings being well documented in a publication that is not behind a paywall for me. Do you have citations at hand?
and the link here draws a distinction that I think is important, the distinction between injury and pain. The paradox of pain, as this article says, is that patients with severe injury have little pain, while other patients with possibly no injury at all have severe pain. Granting that sham treatments (placebos) can reduce patient perception of pain, how do we establish that they produce more healing of injury, more consistently, than the passage of time as the body's evolutionarily selected healing mechanisms work?