Default Should I switch to CM 10.2?

So the Sense 6 update is out. I'm assuming that that means nothing to those of us who are running Sense 6 ROMs. Since the Kit Kat update, my standby time has gone to the dogs. I've done everything. I've disabled location services, denied bad apps permissions, greenified several apps, enabled power saver, underclocked my CPU to 1134 MHz, and I manually control my data and screen brightness.

None of this is doing anything. That pesky Android System and Kernel usage still takes a good 20% of my battery. My mother's One is entirely neglected, and hasn't been updated to Kit Kat yet. It loses only about 1.1% an hour on standby with location services and auto sync and mobile data on. My phone on the other hand loses around 3.5% even if I don't touch it!

This happened on stock, it happened on CM11, and it's happening on VenomOne. This leads me to believe that this is a problem with Kit Kat. Is CM 10.2 a viable option for me? Is it a stable ROM?