I'm not a fan of constant aura buffs either (especially ones that affect passive abilities like insight); because they are harder to run and the benefit is negated by the fact that higher insight characters will still sense the best passively. Why not give half elves the ability to make other...
Dragonborn have a +2 bonus to Charisma because they are descended from Dragons (possibly the most majestic mortal creatures). Right?
Half-elves have a +2 bonus to Constitution and Charisma because the life of a half-breed weeds out the weak and unremarkable.
Am I crazy? Does this make sense