We don't need a feature that do the same thing, but a feature that add complexity in diplomacy and relationship.
I'm not sure if sharing colors add any complexity. I think it removes it. Relationships outside of faction
are often reduced to colors, you don't have to think, you give colors. You give a huge list to someone,
and all the person has to do is to pew pew the right colors. It promotes acting on reflex. Others did the
thinking for you, so you don't have to. It takes away depth not adds it IMO.
You can do alliances and complex "roleplay projects" just fine. Previous season proves it. If they
aren't around it's not because of sharing colorization. It's because staying visible in a town
is in most cases worse than staying on world map.
I see no reason why someone who killed a person should be automatically 100% recognizable as KoS
by his/her 40 fellows all over the wasteland. If I kill your guy on a desert I shouldn't be recognized by
every "anti-pk" in california (or whole PK gang, w/e). You have no individual relations anymore,
only relations with some huge unidentifiable groups of players.