I don't know how you're going to convince people that human or Tiefling racials are anywhere near the same degree of useful as elven and shield dwarf racials.
Let's look at Tiefling racials:
2 charisma, 1 intelligence
Darkvision
Fire resistance.
A useless non-combat cantrip or the even more useless mage hand that requires concentration and doesn't even have the strength for its single only use which would be to push enemies off elevation.
Lv3 a melee range fire cone spell that is not even guaranteed to land despite being single use per long rest.
Now let's look at Elven racials:
2 DEX
weapon proficiencies
1 wisdom/intellect or superior dark vision dependind on high elf/wood elf/drow
Immunity to sleep spell, saving throw against charm.
1.5m extra as wood elf and bonus to stealth
Perception bonus.
Now Shield Dwarf racial:
Light & medium armor proficiency. Spellcasters love this, especially when you get a circlet that gives you 18 intellect in EA and can start a caster with 1h+shield.
Bonus HP per level.
Poison resistance and saving throws against poison attacks (Tiefling only has fire resistance, no saving throws against flame attacks).
Weapon proficiencies
+2 constitution, +2 strength
-1.5m speed.
Remind me again why anyone would touch Tiefling or Humans when these other races are overloaded with far more benefits?
Charisma is virtually useful to a single class in EA, while DEX and Constitution are universally useful to all classes, and incredibly powerful since higher initiative and 1 more AC is pretty big and flexible. Even Strength on shield dwarf is more universal than Charisma, because it also functions in whether you can push targets off walls, increases your carrying capacity to deal with inventory clutter as this game showers you with grey items for sale, it allows you to jump further, etc (which mitigates the lesser movement speed of dwarf, since you cover more distance with jump).
They need to do something about racials balance.
