So, a question for the group:
If we take away the +2 dex form elves, we do create a small issue/problem in that there would no longer be any mechanical reinforcement to the idea that 'elves are graceful.' Elven grace is definitely a trope, and probably important enough for mechanics to represent it, and in the 5e PHB the only mechanic that seems to do this is the racial ASI.
(note that whether +2 dex does a good job is irrelevant - it's the only support, so taking it away means no support at all.)
Is there any other race where this issue would come up, though? Dwarves have other 'tough' mechanics, halflings are still small and lucky, half-orcs are still ferocious, gnomes and tieflings are still magical, dragonborn still have breath weapons. Only elves lose mechanical representation of a trope, as far as I can tell.
Am I missing something here?
I am happy to delete Dexterity from the elf.
Even when it said "elves are graceful", I took that to mean, they are artistically beautiful (Charisma), not really in the sense of body-coordination.
In 3e, if I recall correctly:
The gray elf scores are: Intelligence +1, Dexterity +1, Strength −1, and Constitution −1.
But the sun elf scores are simply: Intelligence +1, Constitution −1.
The sun elf has nothing to do with Dexterity.
Similarly, in 4e. Where either Int/Cha or Int/Dex are possible, Intelligence is primary.
The eladrin elf scores can be Intelligence +2 and Charisma +2.
This eladrin elf has nothing to do with Dexterity.
Now in the 5e Zendikar setting, relating to Magic The Gathering, the Zendikar elves have Wisdom +2. Wisdom is primary.
All of the elven nations but one have nothing to do with Dexterity.
Even going way back to Basic D&D, the elf class merges both Wizard and Fighter, and its scores require: Intelligence Strength.
Again, this elf has nothing to do with Dexterity.
Dexterity is nonessential for the elf concept.