Yaarel
🇮🇱 🇺🇦 He-Mage
(I agree it is mistake to "wait" on WotC. It is a mistake that I have tended to make in the past. But I have come to appreciate the importance, legitimacy, and necessity of indy publishers. If indies have something that DMs and players want, there is every good reason to utilize it.)Which is why I would suggest that you either just play Level Up and get off the WotC train altogether (the best solution IMO) or at least replace WotC's species and background with A5e's origin system (heritage, culture, background, destiny). No need to wait ten years for WotC to maybe "fix" the issue (said fix being unlikely to satisfy anyone in any case).
I am less familiar with LevelUp. As far as I can tell, 5e 2024 and a5e LevelUp are doing something similar.
For LevelUp, mechanics aside, the Culture and Background categories look similar to me. Both offer similar narrative identities (such as Aeronaut background and Airship Crew culture). Both categories can grant proficiencies and feat-like benefits.
For 5e 2024, there is the background with proficiencies and feat within a narrative context.
We havent seen it yet, but there can be an "Eladrin background", meaning proficiencies and feat that one acquires from experiences that are typical growing up within an Eladrin culture. Just like a Human culture can offer multiple backgrounds − Farmer, Soldier, Merchant, etcetera − an Eladrin culture can likewise offer multiple backgrounds − Wizard Army, Supertower Architect, Wand Maker, Student of Multischool Magic, etcetera. The Eladrin society includes different citizens with different experiences.
It is possible to represent a Nonelf who grows up in an elven Eladrin culture, by selecting one of the Eladrin backgrounds.