Fire effect on character arms

So with Hellfire warlocks, Jaguar Spiritborn, Pyromancy Sorcerers or Berserking Barbarians - the flame that appears on the character looks right; in character. However when on anything else (Frost Mage, Shadow Necro, Poison Druid, Abyssal Warlock etc) it looks out of place and weird. Can we toggle it off please or can the team make that effect change based on skill element used?

Just being curious