Looking over all the traits for this mod, I have some suggestions about balance, I will list all the traits here and whether I think they are balanced or not, and why
Draconic Nobility: for 3pts, this is about right
Draconic Pride: This is closer to -1pt than -2pt, -5% all science is -1pt (half of the inverse of intelligent, the unity penalty is worth -0.5pts (half the inverse of traditional), +15 lifespan is almost 1pt on its own
Demon Dealers: without the lifespan penalty is worth 2pts, -10yrs lifespan is worth -1pts, so lower the cost to 1pt, but make sure this trait is incompatible with Serviles and infused souls (otherwise its too easy to dump it onto a secondary species which will never be leaders)
Abyss Gazers: Without the science bonuses this is worth 1pt, with them its more like 2.5pts, you could lower the science bonus to 5% OR lower the mineral/energy to 5% and make it 2pts
Natural Fire Magi: Its mostly fine, compared to Ingenious it has 5% less Energy, but 20% more army damage, perhaps lower it to 15% army damage, or lower the energy bonus to +7.5%
Natural Water Magi: Also mostly fine, though to be more in line with other traits (Agrarian/Ingenious), it should be +7.5% to each, rather than 10%
Natural Life Magi: Same as Natural Water Magi, unless there are other effects, it should either have a different affect, or be removed
Natural Air Magi: This is in a good place, no complaints
Natural Earth Magi: like Water/life, should be +7.5% to each
Naturally Balanced Magi: Increase the gov. ethics attraction penalty to -20%, lower the cost to 3, 4 is slightly too expensive for what it does right now, but 3 would be too cheap
Sorcery: This trait is way too cheap for its power level, its only 2pts, and has the effect of 3x 2pt traits and an additional +15% happiness for only -5% xp gain, which is basically nothing, I would remove the +happiness, increase the xp gain penalty to -25% and add a -1 leader level cap penalty, increase the cost to 4pts (15% food/energy/minerals is 3x2=6pts, -1 for the xp penalty, -1 for the level cap) or rethink the trait entirely
Wizardry: Half the effect of sorcery for the same price (but an extra +10% xp gain, which is basically nothing), still a powerful trait for 2pts, you could increase the bonuses to food/energy/minerals to 10%, remove the happiness bonus and the xp bonus, and its now worth 4pts
Alchemy: After removing the happiness bonus, its worth about 3pts
Enchanting Musicians: +10% happiness is a lot, you could remove the unity bonus and this would be worth 2pts, or you lower the happiness to +5% and increase the unity to +10%, and its worth 2pts
Persuading Song: either +5% happiness for 1pt, or +2.5% happiness and +5% unity, same as above
Exothermic Enchanters: This seems about right
Endothermic Enchanters: Seems about right too
Animalic Polymorphism: This trait is also about right, up the penalty to -10% gov ethics
Plantaeic Polymorphism: Seeing as +10% habitability on its own costs 2pts, this is too strong for 1pt, I think +5% hab and then -10% energy, +10% food is better for 1pt
Specialised Polymorphism: same as above, this is too strong for 1pt, also, if you want all outputs up by +2.5% just use the Resource output from all jobs modifier, its much cleaner, all jobs output +2.5% is worth about 1.5pts, 10% hab is worth 2pts, -5% happiness is -1pt, -5% gov ethics is like -0.25pts, so increase gov ethics penalty to -10%, and either lower the hab bonus to 5% or increase the cost to 2pts
Infernal Origin: This is pretty ok for 1pt
Dragon Blooded: This trait is actually a little weak for 2pts, either increase the army health to +20%, or increase the +physics to +15%
Multidimensional Migrants: This one is a bit strong, mainly because the +hab is worth 1pt on its own, you could remove it and the trait would be worth 2pts, or keep it and its worth 3pts
Voidsweepers: Happiness is worth 2pts on its own, lower it to +5%, and increase the +physics to 15%
Demonic Defaulters: Should be at least -15% energy credits to be worth -2pts
Mulcubi: Use -5% all jobs resource output, its cleaner, without the happiness, this is worth 3pts because pop growth is so strong, with it, its worth 6pts, I would lower the happiness to 10% and lower the growth to 20%, and its worth 3pts
Racial Minority: Happiness penalty should be 5%, or points worth is -2
Infused Souls: Strictly better than Adaptive (+10% hab for 2pts), but iirc its civic locked, so it should be ok
Determined Souls: same deal as infused
Undead Majority: This trait is awful, -25% science output is worth -5pts, and -20% housing usage is worth 2pts, -15% consumer goods reduction is worth about 1.5pts, for a civic locked trait, costing 1pt is crazy, I think State Necromancy should work like Syncretic Evolution, with an undead secondary species and a living primary species, the Secondary species is organic, but with a set of unique undead trait options for different kinds of undead, these wouldnt grow normally, but be 'built' (raised) at Graveyards (like robot factories), I will make a separate post all about what I think about this

Phew, that was a lot to go over, my first post will be discussing my overall thoughts, with some suggestions on how to handle the Sorcery/Wizardry traits