Recently I started working on this project more again after not touching it for a while.  I am working on re-working the PCB again to provide proper connections for the ESP to the audio lines from and to both SA818 modules. This will allow for streaming audio in and out of the repeater along with even voice announcements. (Or implementing an M17 Client for attaching the repeater to a module on an M17 Reflector.) 

I have to do some more experimenting to figure out how to properly connect the ESP audio lines as I don't want to have to re-spin the board over and over. (Its cheap but not super cheap.) 

All in all I am closer then I have been in a while. I hope to have it done before Hamvention this year (May 20-22) so I can bring it with me and show it off some.