I Updated mine via SUS.
This is what I feel after updating .
1) If you do a clean wipe and install a "Google services 5 version" there wont be any Google services hogging up battery for sure .
2) I agree with the fact that setting menu lags while scrolling , by changing setting under developer option (using "force GPU rendering") issue was reduced to 90 percent at least .
3) I still need to monitor battery life as of now its going good.
4) There is lag in conversation and keyboard , any suggestion on how to resolve this will be appreciated fellas .