Just an update. Finally flashed Android 5.0.2 on my TAB S, already rooted with TWRP recovery installed. Will play with it a while in rooted stock . IronROM lollipop is already in alpha, so stock probably won't last long, but I'll take some time to see what they've done with Touch Wiz and such. If I find anything I think is interesting, I'll let you know.