I found out why my battery is worse with the 602 update. Appararently my phone is NEVER GOING TO SLEEP. I forget the name of the service that was keeping it awake. I think it was com.motorola.service.main. After the clear cache, it was good for a day. I took a couple of phone calls and exchanged some text messages and noticed again that my phone was warm. Sure enough, it was stuck again (100% AWAKE even when screen was off for long periods). I cleared the cache again and it has been fine overnight.
I really hope we do get another update because this one is not working too well on my phone (which had few issues with the prior 596 update).