Remathilis
Legend
Seems like you already have a version of half-elf you like. If you're using it for your own game, all you have to do is substitute it for whatever half-elf they are using. If you are using them in a published product, you already have a licence to do it from the 5.1 SRD. Further, there is an almost 0% chance whatever WotC comes up with will match yours.It's a perception issue.
Fay Ancestry is the weakest and least defining part of Elf
A human taking Tough is closer to a Dwarf than a half elf is to elf.
So if updated to 2024 standards, half elf has a lot of design space.
my take
Darkvision
You have Darkvision with a range of 60 feet.
Dilettante
You have a link to the Feywild that extends your natural drive to explore new concepts. Choose a simple weapon or a cantrip on the cleric, druid, or wizard spell list. You know the mastery of the weapon if chosen or the cantrip if chosen.
Fey Ancestry
You have Advantage on saving throws you make to avoid or end the Charmed condition.
Versatile Linguist
You have a fey grace that extends to your ambitious words. You know one additional language of your choice. In additional you have Advantage on Intelligence, Wisdom, and Charisma checks with someone when speaking in a language other than Common. The creature must also be able to understand the language.
So it sounds like you have the solution to your problem already.