Default Should I root for better studying results :D

Hello guys i need an assistance please!

I recently bought this Tablet, and im using it only for studying, so im mainly using the s pen for taking notes, but on the stock rom i dont have many options and tweaks for the pen (like what the button can do). I also dont play games and stuff so maybe reducing cpu power..

I wanna ask is it worthy to root the device and which ROM is good for that (i have ARHD on my HTC device it is great! ), flash a kernel, save some battery life and so on..

Or for these purposes i want it wont make such a difference and i shouldnt bother do all this stuff cuz they wont make a change?