I’d be all for this. So few of the guild crest icons are usable imo, due to either how terrible they look compared to newer textures or how “jokster” they feel. Some of the icons tug you back to the Internet circa 2005, or maybe that’s just the roleplayer in me wanting to find some sort of symbolism or gravitas in a guild emblem, and not feeling particularly excited about a crying bear icon or cartoon foot.
I remember when guild reputation and the new tabards, cloaks, shirts, and banners were put in. Guildies were excited and immediately leveled them up. Gifting them to guildies became part of our onboarding recruitment package. I feel that guilds have been neglected overall as vital parts of the game community, and adding more cosmetics (and revamping the guild UI, because yeesh) would be awesome.