Everybody's doing it, my hackerspace has this thing for dodecahedrons and I thought that would give an interesting challenge.
Trying to find a sweet spot of LEDs and controller.

We're going for it now, 612 LEDs, 51 of them controlled by a single IS31FL3733 chip
I'm wondering how well this would have worked using WS2812-Mini LEDs.
If you look at someone like CoeleCan't on Twitter, they are driving giant RGB Matrices made of NeoPixel-Style LEDs using a Teensy, and the results are quite impressive. That would also reduce the routing complexity of these PCBs.
Apart from that this is already looking really cool, I'm quite excited to see how well it'll work!