Thats entirely your wish! Depends on your needs. If the update holds anything that might bring a spark in you, Do update. But if it doesn't, you dont really have to update! You can instead try using the KK ROMS available for your phone if you plan on unlocking the bootloader for some extra features and fun!
Device Xperia L, UB,rooted,STOCK 4.2.2 (1.14) <Custom Modded! >
Any man that doesn't learn to laugh at rejection is worthless as a man.
NVIDIA tegra note 7 <Custom Modded LB/Unrooted>
Device history - X8,XU,XL,TN7