I guess it's just me, but, I see no compelling reason to update, yes, I saw the moving apps to the SD card deal.
Is the "modem" any better?
Shrug, It still depends on your coverage area.
IF, they ENABLED apps/widgets on a passworded lockscreen,...
Currently using CrossBreeder_6.13.13_v3.zip on Sprint S4, stock MDL ROM,
flashed CrossBreeder_Uninstall_6.18.13.zip via TWRP,
wiped Dalvik - not certain if I had to ?
another Dalvik wipe