@archje you can download my UNOFFICIAL build from here.
Note that you will manually have to install Open Camera and Magic Earth from the Apps store. Magic Earth was omitted, as the build was failing for being too large. Open Camera was included, but for some reason there is no icon for it. Manually installing it from the Apps store creates the icon and results in working Open Camera app.
To answer your question, no I have not experienced the shutdown behavior in the linked thread. My SGH-M919 has never done that before.
@Manoj I’ll see what I can do testing for bugs. One odd thing I’ve noticed is that with a 128 GB sd card which is formatted as “internal”, the card is not available for use until ~1 minute after the phone has started up. That means apps that try to autostart after a reboot, end up failing, and you just have wait a minute and open them again, and then it works. I suspect it’s just taking the phone a long time to fsck or mount the filesystem, due to its size. I’ve read that 128 GB cards were never officially supported on Samsung S4, but it does work with the full capacity available. My S4 is a 16 GB model, and with the 128 GB sd card, it reports 144 GB of usable capacity.