Okay for an actual edition of dnd, i end up with some different answers. Mostly, including humans and normal elfs and lame Tolkien style dwarfs.
Lets see...
Human
- Not generic, they would have specific abilities like ignoring exhaustion, or minor things like not taking exhaustion from running or from travelling at faster pace, or something.
Gnomes
- 4e style but even more "weird creepy little guy" coded. Make them a little scary.
Dwarfs
- One Tolkien style lineage
- One based on troll-like mythical dwarves
- One based on the wise dwarves in some heroic tales where the dwarf king or whatever isnt gross and afraid of the sun
Elfs
- Wood Elves would be a little more fey than 5e ones, but not in a bright magic way like eladrin.
- Eladrin replace high elves again
Shadar-Kai
- not elfs
- Raven Queen is the primary death deity like in 4e
Halflings
4e style travelers with luck and fearlessness and stealth
Firbolgs
- lineages include goliaths who are not half giants but a separate species,
- firbolgs formated more like goliaths, can cast enlarge/reduce 1/day
Tieflings
Aasimar
Genasi
- 4e lore
-
Pixie
- can fly but only while tiny
- can be tiny or small, switch as a bonus action
Orcs
- Primal spirits blessed people, though many live in caravans or cities
Goblinoids
I might totally break goblinoids open and remake them. Hobs become the little guys and have fey magic, goblins are medium and have enchantment magic, and bugbears are basically the same but since i wiuld increase what species can do overall theyd get even more stealth and "get into places you dont belong" ability. Maybe make it so they can squeeze through any space larger than their head, like a cat.
The setting would be Nentir Vale but Feywild and Shadowfell become Faerie, and the fey have a bigger presence. Id like to be able to add a primal type critter similar to genasi and teiflings and aasimar, but it wiuld require combining more species together to make room...