I prefer mechanical resolution to freeform - I think you've read posts of mine in other threads that explain this in terms of the unexpected.That is fair.
My probing @DEFCON 1 was to get an idea behind their thinking and if my ideas were more in-line with what they may consider mechanics for races.
I find DEFCON 1's preference for absolute successes on certain actions when it comes to your race, background, or class quite novel as I have historically been against that style of play, but in their description of it I find it could make quite an appealing D&D-lite game, perfect for a Narrative-styled game.
But I do tend to find some of the endless mechanical minutiae of D&D-type races a bit unnecessary or unhelpful - as in, it pushes in the wrong direction.
In my Torchbearer 2e game, Elf vs Dwarf is a big part of the fiction but it isn't supported by D&D-style race mechanics. It is done by differences in a few key descriptors - Nature descriptors (analogous to personality-type descriptors in 5e D&D), one trait descriptor and one Wise descriptor (these latter two work a bit like your examples of when advantage might be granted).