Shadowmeld can dodge HOJs, Polymorphs, Fears...So on & so fourth.
Did we also forget that Night Elf have wisp form, which allows them to potentially avoid 20+ second resurrection timers? This is extremely useful for getting repicks, crossing mid, escorting FCs, etc...
NE basically have a 2nd trinket, can avoid overwhelming burst and body res extremely quickly. For you to not understand how valuable these racial abilities are, I'd assume you're new to MMOs.
In a bracket with very limited mobility, a sprint is also extremely valuable.
You also forget to mention Goblin.