Never seen anyone complain about this before; most people don't really care about it. Think, this may be a world where names have deeper meaning than our modern society, just like in orthodox Judaism where God must be replaced with G-d. A name is specialized for a certain person and no one else. Plus, there are only 750 cycles of recorded history in Yliakum, so people aren't likely to share the same name.
Characters can already share a last name, just not in character creation (a GM can let you share a name with someone, or you can get married). If you were the first person with the surname Yarglarbithoqar, wouldn't you be annoyed if some random person, who your character was definitely not related to, had the same surname when you were the one who created it?
Aaand... sharing the same first name would screw with /tell since it requires the recipient's first name to be sent.