I must be fortunate, out of the 6 demos I've seen, none have been "nursery stock to finished tree" type!
Matter of fact, one demonstration was a tree that already had some styling, and was in "stage two", refinement-for the reasons you gave! The artist said they felt we'd seen enough chop chop type and thought we'd like to see refinement type demo. Several demos have been nursery stock, but every artist said enough work had been done that it was better to wait to put into a pot. They talked about what kind of pot it might look best in, but there the tree stayed in the nursery can

. Another demonstration was on using slash pine for bonsai (Dorothy). She demonstrated how to bend a branch, and the whole time emphasized health of the tree. She also did a seperate demo on a juniper, and again, emphasized health of the tree. Another demonstration I saw was plants that had had some work done being made into a forest... again, no chop-n-pot there.
Perhaps, rather than fault the medium, we should start asking the demonstrators to expand into other items? If the club says, hey, here's what we'd like to see.... rather than leave the demonstrators thinking chop-n-pot is wanted, everyone can be happy! Keep the chop-n-pot for the county fairs where the intent is to get warm bodies interested long enough to want more........
I propose that demonstrations stay

. I for one would like to see more of them.... I haven't seen a bad one yet.
Brian's idea is a great one! Just need to tell this to the demonstrators. "Hey, could you bring a raw item and work it a bit, a partially worked item, and a more refined item to see the progress?" If the club provides the trees, hopefully you could find 3 of the same species... If it's a "new" species, well, then we're stuck a bit

.