The rom (full package) will be downloaded in /sdcard/.OtaThis is interesting.
So even though I am rooted, it is saying I can download the whole package and flash it, but I will be unrooted afterwards.
I think I'll still do it myself later tho, lol.
Don't flash (you can but you will lose root and twrp if you boot into system right after).
Move the rom from /sdcard /.Ota to /sdcard, and then reboot twrp, flash rom, flash root, wipe cache and dalvik (dirty flash =update) reboot system and voila!