Also, they kind of do have an "evergreen system" for naming the crests. The first part of the name refers to the quality of the crest, based on their respective expansion (whelpling/wyrm/drake/aspect for Dragonflight, and weathered/carved/runed/gilded for TWW) and that naming lasts the entire expansion, then we have the second name which refers to the seasons within an expansion, such as harbinger/Undermine for TWW.
Actually, I've been 'roadblocked' by the stones a couple times on my main character when I stopped doing WQs on a consistent basis when upgrading my gear, and have been roadblocked several times on alts.Also, I'd probably drop the X-stones currency, personally. The crests are the real roadblock/cost, and that would make them more analogous to the old justice/valor points or the various emblems.