D&D 5E (2024) How I would do 6E.

[Horwath]

i'd hope in 6e your species would be approximately as mechanically impactful as your subclass is in 5e

I think that can be made with Racial feats.

So if you want to be Dwarfy MacDwarf and be the dwarfiest dwarf that ever dwarfed, take 2 dwarf feats.

species/racial abilities should be one or one and a half feat worth as base level. Tops. and to be mostly universal in application.
For all types of characters.

IE: +HP per level, +speed, teleport, healing, extra skills or tools is universal

bonuses to spellcasting or attacking or stealth is not.