They need to address the battery drain issue with 33R.
To be honest, I don't see any problem with battery life. It has always been the same since 22R for me.
Based on my usage, my OPO start from 8 am in the morning and will reach around 10% left at around 12 midnight. With 25R and 33R, it's just plus minus 5%. Some more I play my online card game throughout the day.
In fact as off this moment, my battery is now at 65% after 8 hrs with 2 hrs on screen time.
Of course I don't deny that some people are facing battery problems but there are too many factors in play to just point the finger at battery drain problem.
Edit: Just to clarify, I'm on a custom kernel so there may be some improvements on battery life. However I did run the phone on stock 33R kernel for a while and it's pretty much the same usage time for me.