Consciousness: what is it?

But couldn’t this perfectly well describe a non-conscious, zombie-robot decision maker, with a growing history of non-conscious decisions and experiences?

If your question wasn’t rhetorical, how about the following?

Consciousness is a confused analysis of our thought processes, in which we mistakenly (albeit usefully) compare them to the activity of some kind of internal theatre, with or without an audience, but with sound and pictures?

Perhaps we could apply your theories of evolutionary utility to this very capacity for confused self-analysis?