This is perhaps a minor issue, but it seemed worth mentioning.
I have an Avenger and a Faust, and frequently bring both out with me on delves. I've noticed that, when switching from one to the other, sometimes the texture colour of the previous weapon lingers for a few seconds before changing; that is, I'll switch from Avenger to Faust, the "switch" animation plays, but the texture remains as the Avenger for awhile.
I've not had a chance to test this with other reskinned weapons, and it's not usually a big deal (although it has got me in an amount of trouble in particularly hectic fights, particularly Arenas; switching to fighting Retrodes from fighting Wolvers, for example, the momentary confusion can throw me sometimes), but as I say, it seemed worth bringing to Three Rings' attention.
You can also make a DBB or BTB glow blue momentarily by switching from a Voltedge.