I think I found a workaround that decreased the battery drain and brought it back to pre htc update. I turned on nfc, wifi and gps (i usually leave nfc and gps off) then drained the battery to 1%. At that time im losing round 7.9% of battery per hour. After that i turned nfc, wifi and gps off again then charge my phone to 100%. It's been 8 hours since my last charge and battery is at 94%, with battery drain of 0.7% per hour.
Im using battery sense to monitor my phone's battery drain by the way. Not sure what exactly fixed the battery issue, but im sure that one of the steps did the trick.