since nobody is kind enough to reply me, I will share some of my finding in M7 LP5.
Took more than half an hour to fully upgrade; a app call "Clean Master" was installed, this app also found on Z3, I uninstall it immediately, prefer to manage apps myself; the others changes are like the M8 links attached in my previous post, except the DND is replaced with Priority--this can not be chose to add contact group to exception, only favorite, can not choose Sunday--WTH?!
To my surprise, the battery life actually improved! maybe it was because my M7 had excessive battery drain after the latest damn google play service update, 4%/hr with the phone idling! only solution was to disable GPS in location. after upgrade, it only drop 2~3% overnight--6+hrs--with GPS enable and power saver off! I hate the white box notification, why can't HTC change it to white text on transparent or at least black background.