I don’t really consider any of the non-mutation starting traits “too good”. I can play characters with no good traits and characters with a full 12 points of good traits and play them about the same; in fact I actually prefer keeping positive traits to a minimum since I feel like I can hit the ground running with the right starting skills instead of traits. Parkour Expert is one of my favorite starting traits, but it’s still not necessary to me.
If you want to consider mutations available in the Lab challenge, Fluffy Tail is without a doubt in my mind too good and I always take it. Spend 1 trait point and lose the ability to wear non-fabric pants (not a big deal unless you’re a fan of power armor) in exchange for effectively 4 more levels of dodge skill. That’s followed closely by Whiskers, 1 trait point and requires your face to be uncovered in exchange for 1 dodge level, good but not as good later since I’ll usually have my face covered. Fluffy Tail + Whiskers + 3 starting dodge skill = effectively 8 starting dodge skill.