Let's discuss, probably for the 1000th time balancing racial passives - here are my suggestions. Sorry, not sorry, for the long wall of text, but I think making some small improvements in passives would actually balance the races if such a thing is even possible. Anyway I might be wrong, but here is my opinion on the matter. Some don't change, but most only get subtle changes.
Breton
Gift of Magnus Rank 1 Increase Max Magicka by 4%
Rank 2 Increase Max Magicka by 7% and Magic Damage by 2%
Rank 3 Increase Max Magicka by 10% and Magic Damage by 4%
Spell Resistance Rank 1 Increase Spell Resistence by 1320
Rank 2 Increase Spell Resistence by 2640
Rank 3 Increase Spell Resistence by 3960
Magicka Mastery Rank 1 Reduces the Magicka Cost of your abilities by 2%
Rank 2 Reduces the Magicka Cost of your abilities by 3% increases Magicka Recovery by 5%
Rank 3 Reduces the Magicka Cost of your abilities by 4% increases Magicka Recovery by 10%
Orsimer
Brawny Rank 1 Increase Max Health and Max Stamina by 2%
Rank 2 Increase Max Health and Max Stamina by 4%
Rank 3 Increase Max Health and Max Stamina by 6%
Unflinching Rank 1 Increase Magicka, Stamina, and Health Recovery by 6%
Rank 2 Increase Magicka, Stamina, and Health Recovery by 13%
Rank 3 Increase Magicka, Stamina, and Health Recovery by 20%
Swift Warrior Rank 1 Increase damage with melee weapons by 2%, reduce sprint cost by 4% speed by 3%
Rank 2 Increase damage with melee weapons by 3%, reduce sprint cost by 8% speed by 6%
Rank 3 Increase damage with melee weapons by 4%, reduce sprint cost by 12% speed by 10%
Redguard
Exhilaration Rank 1 Increase Stamina recovery by 3%
Rank 2 Increase Stamina recovery by 6%
Rank 3 Increase Stamina recovery by 9%
Conditioning Rank 1 Increase max Stamina by 4%
Rank 2 Increase max Stamina by 7%
Rank 3 Increase max Stamina by 10%
Adrenaline Rush Rank 1 Melee attacks restore 241 stamina
Rank 2 Melee attacks restore 522 stamina
Rank 3 Melee attacks restore 792 stamina
Argonian
Resourceful Rank 1 Max magicka by 1%, restore 762 health, magicka, stamina
Rank 2 Max magicka by 2%, restore 1525 health, magicka, stamina
Rank 3 Max magicka by 3%, restore 2110 health, magicka, stamina
Rank 1 Max health by 3%, poison and disease resistence by 495
Argonian Resistence Rank 2 Max health by 6%, poison and disease resistence by 990
Rank 3 Max health by 9%, poison and disease resistence by 1485
Rank 1 Healing done and received by 1%
Quick to Mend Rank 2 Healing done and received by 3%
Rank 3 Healing done and received by 5%
Dunmer
Dynamic Rank 1 Increase Max Magicka and Stamina by 2%
Rank 2 Increase Max Magicka and Stamina by 4%
Rank 3 Increase Max Magicka and Stamina by 6%
Resist Flame Rank 1 Increase Max Magicka by 1% and Flame Resistence by 693
Rank 2 Increase Max Magicka by 2% and Flame Resistence by 1386
Rank 3 Increase Max Magicka by 3% and Flame Resistence by 2079
Destructive Ancestry Rank 1 Increase flame damage by 3%
Rank 2 Increase flame damage by 5%; Frost and Lightning damage by 1%
Rank 3 Increase flame damage by 7%; Frost and Lightning damage by 2%
Nord
Stalwart Rank 1 Increase max health and stamina by 2%
Rank 2 Increase max health and stamina by 4%
Rank 3 Increase max health and stamina by 6%
Resist Frost Rank 1 Increase cold resistence by 693; increase frost damage by 3%
Rank 2 Increase cold resistence by 1386; increase frost damage by 5%
Rank 3 Increase cold resistence by 2079; increase frost damage by 7%
Rugged Rank 1 Increase damage reduction by 2%; increase magicka recovery by 2%
Rank 2 Increase damage reduction by 4%; increase magicka recovery by 4%
Rank 3 Increase damage reduction by 6%; increase magicka recovery by 6%
Altmer Rank 1 Increase Magicka recovery by 3%
Spellcharge Rank 2 Increase Magicka recovery by 6%
Rank 3 Increase Magicka recovery by 9%
Gift of Magnus Rank 1 Increase Max Magicka by 4%
Rank 2 Increase Max Magicka by 7%
Rank 3 Increase Max Magicka by 10%
Element Talent Rank 1 Increase Flame, Frost and Shock damage by 2%
Rank 2 Increase Flame, Frost and Shock damage by 3%
Rank 3 Increase Flame, Frost and Shock damage by 4%
Bosmer
Y'ffre's Endurance Rank 1 Increase Stamina Recovery by 7% and Max Stamina by 3%
Rank 2 Increase Stamina Recovery by 14% and Max Stamina by 6%
Rank 3 Increase Stamina Recovery by 21% and Max Stamina by 9%
Resist Affliction Rank 1 Increase poison and disease damage by 2%; poison and disease resistence by 495
Rank 2 Increase poison and disease damage by 3%; poison and disease resistence by 990
Rank 3 Increase poison and disease damage by 4%; poison and disease resistence by 1485
Stealthy Rank 1 Reduce detection by 1m and increase damage by 3% in stealth
Rank 2 Reduce detection by 2m and increase damage by 6% in stealth
Rank 3 Reduce detection by 3m and increase damage by 10% in stealth
Khajiit
Nimble Rank 1 Increase health recovery by 6% and stamina recovery by 3%
Rank 2 Increase health recovery by 13% and stamina recovery by 6%
Rank 3 Increase health recovery by 20% and stamina recovery by 10%
Stealthy Rank 1 Reduce detection by 1m and increase damage by 3% in stealth
Rank 2 Reduce detection by 2m and increase damage by 6% in stealth
Rank 3 Reduce detection by 3m and increase damage by 10% in stealth
Carnage Rank 1 Increase weapon crit by 2%; critical damage restores 241 stamina this can occur once every 5 seconds
Rank 2 Increase weapon crit by 5%; critical damage restores 522 stamina this can occur once every 5 seconds
Rank 3 Increase weapon crit by 8%; critical damage restores 792 stamina this can occur once every 5 seconds
Imperial
Tough Rank 1 Increase max health by 4%, increase damage reduction by 1%
Rank 2 Increase max health by 8%, increase damage reduction by 2%
Rank 3 Increase max health by 12%, increase damage reduction by 3%
Conditioning Rank 1 Increase max Stamina by 4%
Rank 2 Increase max Stamina by 7%
Rank 3 Increase max Stamina by 10%
Red Diamond Rank 1 Your melee attacks have a 10% chance to restore 2% of your max health, magicka or stamina based on your lowest resource
Rank 2 Your melee attacks have a 10% chance to restore 4% of your max health, magicka or stamina based on your lowest resource
Rank 3 Your melee attacks have a 10% chance to restore 6% of your max health, magicka or stamina based on your lowest resource