Horwath
Legend
it's irrelevant how it feels, we should focus on mechanical benefits and is it innate/genetic or something trained/learned.For Perception, the "Proficiency" feels cultural rather than innate. But I am ok with Advantage, where even an untrained can benefit.
Because 5e got rid of most bonuses for the sacred altar of bounded accuracy, we cannot have racial/species bonuses.
I would personally slap a +4 to Perception for all elves and be done with it.
And since we cannot have that, proficiency+expertise is next best thing.
I would not have global advantage as that is IMHO a temporary and circumstantial benefit.
As for darkvision, add it to the list of Elven superior senses.