As I sit here, frustrated with Safestrap and the endless iterations of Touchwiz roms, my upgrade through my job has offered me the way out. I ordered my Nexus 6 yesterday and will look back fondly on the S5 as the phone that should have been a flashfest but got cut down in it's prime by the locked bootloader. I really really wish it could have been more, it's just such a great device but I think even devs are having a hard time just continuing to develop for it because of the Touchwiz limitation. I'll keep rolling along with the S5 while I wait for the N6 but part of me will be sad to see it go. Good luck to everyone with the wait for the bootloader unlock!
Edit: I almost forgot! Shout out to elliwigy and his extremely fast and awesome Extreme Syndicate for making this bearable! If you haven't flashed it yet, give it a try!