Really?does no one get how abusable that solution would be you would end up with nothing but min-maxed hybrids?
I did not propose that there should be a free pick and mix from the traits of both ancestor lineages but that there be a trait(s) that are specifically siloed off that are roughly equivalent for all races.
For example a Half Elf (mostly human) from the playtest material
(from elf) Keen Senses
Or the opposite mostly elf
(From Human) Skillful
But i would prefer if they actually built it properly with a actual sharable traits silo or take @darjr idea of a racial ancestry feat for just this purpose.