There used to be a glyph that made your Dreadsteed walk on water leaving behind a cool fire trail! I think it would be amazing, if we can get this functionality back, and maybe even add it to the Legion class mounts!
I understand that it’s a more complicated request now since the introduction of mount equipment, but you can just disable the equipment on mounts with effects like this, like you did with the Sky Golem. Also do the same treatment to the water strider.
Ideally it would be a glyph, so only players who want it will get it.