i was so worried that the Exynos octa will make the samsung flagship root as hard as the rest if not harder.
galaxys4root.com has the way to do the root s4 i9500 with odin in few steps exactly like S3. you don't need to download 1.5GB pre-rooted roms or anything else big for that matter.
i don't know if i could (according to the forum law) do the complete "how to" right here or even share this, but i'm sure guys here know what to do with this
the link to the method: http://galaxys4root.com/galaxy-s4-ro...s4-cwm-method/