I guess this goes without saying to you lot who have been around for a couple of expansions, but reading the beta source code before you're actually in the beta can save you both time and energy. I'm working on a UI replacement that may or may not be ready by the time the expansion hits and I did something stupid.
I spent roughly two days worth of extracurricular time re-designing the GlyphFrame with custom textures and fancy animations, only to find out the entire Blizzard_GlyphUI addon is apparently being scrapped in Legion (woops). In retrospect, I guess this information was fairly obvious, but it just happend to pass by unnoticed on my end.
Anyway, here's the design that will go in the dumpster soon. Ironically, the runes were stolen from the new challenge mode key stone frame.