The *MOST* that I can think of racial traits would be some type of mild elemental resistances. Anyone can
+5 or +10 here and there.
Unless it was like (and I'm not saying it should be) some movement enhancing effects that last brief periods of time.
A Hyur has some type of Party AoE Run Speed +30% for 15 seconds. Cooldown of 2 minutes.
An Elezen takes their lanky legs and jumps to a designated destination maybe 20 malms away. Cooldown of 1 minute.
A Lalafell teleports (there need be no lore reason for this, their cuteness can manifest itself anywhere) some 20 malms away. Cooldown of 1 minute.
A Miqo'te sprints like a cheetah-kitteh, Run Speed +70% for 15 seconds. Cooldown of 2 minutes.
A Roegadyn tucks his legs under his arms and cannonballs forward 20 malms. Cooldown of 1 minute.
Can only be used out of combat or without enmity.
Not fun. Mostly obsolete with mounts. But not as dangerous.