In short, I don't like that Rune's are limited to group content acquisition, particularly due to the very peak and drop off prone nature of ROSE. In NA during the after-noon when most people have spare time, the game is a dead-zone for group content. Making it feel very unrewarding for NA or even just GMT-5/-8 time-zone players.
I'm not going to post/share any of my ideas, as frankly I just want the community to get behind ANYTHING that resolves this issue and too much debate tends to circle anything I post as a possible solution.
So share below your ideas for solo-able rune material farming, and let's see if something can happen to fix it.