Title pretty much explains itself. We have costly positive trait that cost up to 5 points, but we have almost no mean to buy them - well, unless you're OK with having only one positive overpriced trait.
- Why no "Very weak"?
- Or "Very non-adaptive"?
- Or something that is not present currently at all, maybe negative resource traits?
- Etc.?
I wish paradox will do something about costly trait, i dont really see much use for them currently.
Also, it's just me, or +1 skill trait doesn't worth 2 points, too?
Welcome to the difficulty topic of managing options for the player.
In particular they have to keep a Balance between Population Traits (only mater if lot of population of that species), Leader Traits (only mater if you do/do not allow Xeno Leaders), and Primary Species traits (like Resilient).
Why no Very Weak? Because weak is pretty much a free point and effortlesly dodged just conquering any other species or using Robots. Armies do not mater enough in this game.
No Very non-adaptive? Adaptive is already a big limiter. Keep in mind that population under 50% happiness will join factions. And dropping the Habitability low enough will cause that state forcefully. Plus you are propably planning to just dodge it using another Species/Robots as colonists anway, no reason giving you more traits for Primary Species/leader Traits.
No negative Resource Traits? First t would affect the game Start too much. Sure +20% Minerals does not mater 50 years into the game, but early game it does. Why do so many people stay on full Slavery early game otherwise? And secondly, it could again be easily dodged.
With Talented + Direct Democracy you can recruit leaders at level 3. 4 when you get your advanced government, and 5 with Selected Lineages.
By the end you can be hiring five star leaders for super cheap influence, making their lifespans somewhat irrelevant.
Heck, for Autocracies Fleeting is Plain a Bonus. More Leader Uniques buildable.
One issue with the system might be the lack of granularity. Try the following:
Multiply number of free trait points, trait points from GE tech and cost of Traits by 10.
I do agree that venerable is useless on top of Overpriced. 5 Star Leaders are not that important outside of Science. Where you can just hire a Curator with the DLC.