I also say no.
In the beginning days of ACS 4 most of the package porters at AD created priviliges sub classed from the main set of permissions.
After some thought and learning it was determined that the only real need for a permission is when the standard ones don't work. I also don't see what creating etp_publish as a child of admin buys you. You will in effect be giving them admin permissions anyway. What does a person with publish permission do different from an admin?
