Maybe this could be more explicit. Do you mean adb sideload system(sim_support).zip ? Then maybe it should be said whether to reboot or not. (twrp suggests rebooting).
Is there a way to say in the documentation that TWRP twrp-3.0.2-1-i9305.img needs to be used for the adb sideload to work ? Looks like https://github.com/TeamWin/Team-Win-Recovery-Project/issues/1500 Or maybe the image needs to be generated differently ?
Seems to be working (booting right now) 