They’ve already done some of this, for example, with monk glyphs and I believe druid glyphs, although there’s multiple classes where this would be fantastic:
- Paladin - holy spells could be gold, red, or white
- Priest - holy spells could be gold or white
- Monk - ALL of their spells could be one of the four color variants - white, teal, red, gold
- Mage - Frost could be white or blue or teal, fire could be red, orange or gold, and arcane could be purple/blue/teal or something.
The big argument used to be PVP (like so many BS arguments) but that’s no longer something I think anyone truly cares about, so now it’s about what’s able to generate revenue. And these ideas, unless tied into something that drives expansion purchases, or tokens, simply isn’t going to happen. So if you want it to happen, convince Blizz you will pay for it, or forget about it.
When they say “too much work to be worth it”, that’s what they mean.