Hi Guys,
The issue is solved without any workaround!
Till yesterday I was also suffering from this issue. After a 4.3 firmware upgrade suddenly the battery life of my phone deteriorated like anything. I did a lot of searching aroung on the various forums, and found out that for my phone, the location service that came with the latest 4.3 update had a problem and was the culprit eating up the battery. I of course unchecked that option in my settings and the battery life became almost similar to how it was before the 4.3 upgrade. Please note it became "almost simliar", not perfect!
Of course there are options of unchecking various push notification, NFC et all, but whats the use of a 40 grand smart phone if you have to keep these settings off? I also lived with location services "checked-off" for close to 2 months, crying inside because I am a regular on various apps that use location service.
Anyhow day before yesterday (in India), I got a firmware upgrade message but as the upgrade service had already exceeded the over the air roll outs, it asked me to use Kies for the upgrade. Likewise, I did the upgrade last night and voila! the battery is perfect. I left my home in the morning at 8 am with 100 % battery, and with a more than average usage the battery is 94% after 2 and a half hours!
Do let me know if you have any specific questions.
Cheers!