Post [Q] lost buttery smoothness after updating to 4.2.1

I m using stock 4.2.1 on a116. Fps reading on mutlitasking window, scrolling images, zooming in/ out and in the stock launcher is restricted to less than 65 which is not so very smooth ( at times its 50~ too). So i used tsf shell where fps readings on home scrolling and other launcher related activities reaches 78, but yet on the above mentioned activities it still laggy. Can i bring back the buttery smooth experience to the entire phone?