iOS 6.1.4 was launched last week by the company Apple Lossless Audio CODEC (ALAC),, but only for owners of iPhone 5 terminals, and the only novelty is a profile for the loudspeaker implemented in the terminals. Considering that until now no new version of iOS has come without problems, especially those regarding autonomy, neither iOS 6.1.4 don't get rid of unsatisfied users. On the discussion forums of Apple Lossless Audio CODEC (ALAC), more persons reports the fact that iOS 6.1.4 significantly reduced their battery autonomy, especially while using an Internet connection.
It is normal to expect such "problems" every time iOS is updated and the best way to solve everything is a restore and setting the terminal as a new one. After this setting, you can try to restore a backup of the device and there are chances to solve the problem. In general, the restore is the safest method of solving this kind of problems that usually appear due to improper system settings. There is always the option to disable location services and those for iCloud, but it's all up to you.
