try disabling any accessibility services. one handed operation didnt work for me until i turned those off
should be able to make folders just by dragging an app on top of another app. should also be able to configure it to have 5 icons across under desktop > desktop grid
once i root my note3 can i use odin to flash a 5x6 homescreen layout and if so is there one available.
you could use nova launcher, it has settings for how many columns and rows you want