Dragonsbane
Proud Grognard
In my custom game world there are a number of human subraces, each in a way modeled after a real country or culture (or combination). Yes, very original, I know 
So the question! My humans do not get a +1 to 6 stats, or the variant human (feat at 1st? oh no no . . ) abilities. Rather, they will get
- +2 to one stat, determined by subrace
- +1 to two other stats
- Proficiency in a skill (w/ something, see below)
I wanted the humans to seem a little more like skill monkeys, hence the skill. Still, it seems a little weak. So, I could . . .
Choice A) Proficiency in a skill, and you gain advantage with this skill check if you gain the same proficiency from a class or background . .
Choice B) Proficiency in a skill, and you have expertise with this skill check if you gain the same proficiency from a class or background . .
Choice C) Proficiency in 2 skills?
Not 100% sure which to go with, since I have played 5e some but the math sometimes surprises me. Expertise seems like a good choice until high level, while advantage seems . . dunno, good most of the time, but might cause an issue with particular skills? Hard to say.
Any choice seem over the top? Too weak? Balanced?
Help me choose an option above, or something else?

So the question! My humans do not get a +1 to 6 stats, or the variant human (feat at 1st? oh no no . . ) abilities. Rather, they will get
- +2 to one stat, determined by subrace
- +1 to two other stats
- Proficiency in a skill (w/ something, see below)
I wanted the humans to seem a little more like skill monkeys, hence the skill. Still, it seems a little weak. So, I could . . .
Choice A) Proficiency in a skill, and you gain advantage with this skill check if you gain the same proficiency from a class or background . .
Choice B) Proficiency in a skill, and you have expertise with this skill check if you gain the same proficiency from a class or background . .
Choice C) Proficiency in 2 skills?
Not 100% sure which to go with, since I have played 5e some but the math sometimes surprises me. Expertise seems like a good choice until high level, while advantage seems . . dunno, good most of the time, but might cause an issue with particular skills? Hard to say.
Any choice seem over the top? Too weak? Balanced?
Help me choose an option above, or something else?