One of the things that I liked was his proposal that we call the unit of imitation (as proposed by Blackmore) a "mime".
"Mime" is more closely linked etymologically to "mimic" and "mimicry".
It doesn't end with "-eme" the way most units do (e.g. Lexeme, Phoneme, Morpheme, Sememe, Seme, Grapheme) - but a unit of imitation is not that useful scientifically anyway - since it is much more important to have an umbrella category that covers all forms of culture. Since imitation is one component of social learning, mimetics is a subset of memetics.
Others have used the terms "mime" and "mimetics" for similar ideas - in particular see René Girard’s "mimetic theory", and the ideas of Merlin Donald.
The terms "mime" and "mimetics" seem to be a suitable way of symbolically demoting the idea without completely discarding it.