How about making it possible to label things so everyone can see whats in that certain crate/chest/barrel without having to open it. Maybe just by hovering your mouse over that certain thing your aiming at. Would be really nice for big guilds with lots of members who have warehouses with materials and such.
I do not like the ability to 'name' things and show them with tooltips, as it is not feudal.
Would opt for my suggestion instead, where you can make sign's. Any child can paint, barely any peasant can read or write.