Yeah, it is an interesting question to contemplate, but that is what they have stated that is what they are doing. I think you might be onto something about which are inte ded for Intelligence boosting Backgrounds: and in current 5E rules, Backgrounds are precisely for gating optimization and suggesting quirky suboptimal builds grounded in narrative.
"Backgrounds representing their connection to wild talents will be included with these feats in a future book if they become official, but in the meantime a character who takes the Noble or Sage background can choose a Wild Talent" nothing here to me rules out the idea that they will present backgrounds that say "choose any Wild Talent feat." And I do feel that is still their best move.
But let's see what might feel right:
Atmokinesis
As a young person you realized you have control of the weather. You have hidden your talent, but were considered a lucky charm by a ship's crew or a merchant caravan and have traveled along with them, never letting them know you were more than a lucky charm.
Wisdom, Dexterity, Constitution
Cartography Supplies
Survival, Nature
Biokenesis
You developed an innate ability to stitch together wounded folk, and shape your own flesh. You have become an itinerrant healer concealing your gifts as standard medical knowledge
Strength, Constitution, Wisdom
Healer's Kit
Medicine, Persuasion
Clairsentience
You see things in your mind that others seem blind to. You served as a fortune teller to a local ruler, or in a traveling circus.
Intelligence, Wisdom, Dexterity
Navigator's Tools
Insight, Investigation
Cryokinesis
As a child when you were scared or threatened, a cold chill would hang around you. Feared as being some sort of fey spirit or devil you were abandoned by your village and now survive on your own apart from others.
Dexterity, Strength, Intelligence
Cartography Supplies
Survival, Insight
Empath
Your whole life you have an uncanny ability to bend people to your will. As you have started to embark on a life of adventure, you wonder if this is just natural talent, or supernatural power.
Charisma, Wisdom, Intelligence
Gaming Set
Persuasion, Insight
Fleshmorpher
After a horrific accident you found you have the ability to shift and change your shape.
Intelligence, Dexterity, Constitution
???
Acrobatics, Sleight of Hand
Mind Whisperer
You are able to insinuate your thoughts into the minds of others
Intelligence, Charisma, Dexterity
???
Deception, Intimidation
Psi Trickster
You can make people see things that aren't there
Intelligence, Charisma, Dexterity
Forgery Kit
Deception, Persuasion
Psykinetist
You learned that you are able to move things with your mind. Accused of witchcraft at a young age you have hidden your talents and use them only when you are unobserved
Dexterity, Strength, Intelligence
???
Athletics, Sleight of Hand
Pyrokineticist
As a child mysterious fires sprung up when you were angry or scared. Driven out of your village you have sought adventure to learn how to control your talents.
Intelligence, Strength, Dexterity
???
Intimidation, Survival
Not terrible. And even if I felt that the Wild Talent was centered on a theme of hunted mutant, at least I was able to give a greater spread of abilities and skills.