Okay, update (v2.0 lol)
If you read my last post concerning the SecMms.apk, I installed Metropolis 1.2.0 and deleted SuperSU, but only AFTER installing Superuser... I've since rebooted many times, in an effort to re-create the problem, but have not had the same loss of Root issue (and failure of the new SecMms.apk) that I had before.
Barring further testing, I can only assume at this point that the problem was with SuperSU... hopefully I won't eat my words later, but that's what it looks like at this point.
Can someone else please try this for me?
1. Install Metropolis 1.2.0 (a CLEAN install, of course), and then boot into the ROM
2. Go to Play Store and download the free version of
Superuser. Open and update it's Binary.
3. Go into SuperSU and select "Settings", then scroll down to "Switch superuser app". That gets rid of it. Do that, and then reboot.
4. Go back into your recovery, and then flash the mms test.zip
3. Reboot and try it out.
Please report your findings.
Thanks guys.