I've seen it in other games and I'd love to have it for FFXIV!

For me personally there isn't much flexibility when it comes to designing a Free Company crest and thus there's the chance that other Free Companies have the same design...

What I would love to have is the ability to create a company crest via the lodestone that you can then set to your Free Company (if you're the leader) and it'll be shown in game...

for instance you get the choice of up to 50 layers of shapes etc etc (I know this can give birth to the chance of inappropriate designs - just means if one is loaded that FC gets disbanded on SE end - yes this means don't act like an immature child or have your FC destroyed)

Give us shapes and we'll give you a design! XD but seriously I'd love to design my own crest from scratch to be shown in game!!!