Suppose as an alternative to "changing" the name, we just start
promoting "Postgres" as an alternative version of PostgreSQL in the
course of advocacy efforts, essentially promoting it to equal footing
with PostgreSQL.
I personally don't think that this would cause any substantial
confusion, and would avoid the work involved in a full name change.
Then, down the road, if we want to, we can revisit the decision.
This would seem to give everyone what they want.
Best Wishes,
Chris Travers