[Q] who downgraded back to KitKat and why topic

So just received my 2nd RMA tablet and it came stock with KitKat. My original tablet, I upgraded to lollipop and rooted right after. I want on lollipop long enough to know if I liked it or not. Just want to get some input from you guys if I should upgrade or just sick to KitKat and root that. Thanks in advance XDA!