Choreography Declarative/Procedural Spectrum

It seems to me that one of the most valuable pieces of input we are going to
be giving this WG is some sort of framework for segmenting what can be done
into a hierarchy of complexity -- so that they can avoid trying to do
everything for everybody right out of the gate.  In this spirit, would it be
useful to define some sort of "way-stations" on the Declarative/Procedural
spectrum?  I am sort of assuming that the further you get into procedural --
with multiple levels, yet -- the more complex it gets.  So would it be
possible to define a "starter set" that has value and is mostly declarative?
Then a level of procedural issues that can be layered on top of that in a
second step -- and so on?