My addon link (currently named ClickBoxHealer)
http://www.riftui.com/downloads/info...BoxHealer.html will be a rework of RiftHealer. I linked back to his addon, gave him credit, and even noted the original authors name documented in my addon and on my page. I tried both by email and PM to contact the original author for 1 month prior to starting this project.
This began as a learning experience for me and will turn into completely re-coding the addon only keeping some basic functionality of the original. So "taking over" I guess would only be relative. I'm using his addon as a stepping stone. Still giving credit to him for the original code. If this is an issue I'll be glad to do whatever is needed to correct it.