Regarding the amber eyes thing, all normal night elves are born with silver eyes. The eyes can turn amber as the elf awakens his/her own power/potential. Playable night elves have amber eyes because we're already just that awesome.
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Here's Nobbel's take on this questline. IMO it's better than the Wowhead video because he notices a lot more detail and he doesn't tend to be a douchenozzle about everything.
https://youtu.be/yrlMH3BukKw