Hey, like title says, it should not be a problem to do actually.
Player updating side:
Client sided: (I think its Player.java)
name = TextClass.fixName(TextClass.nameForLong(stream.readQWord()));
name = stream.readString();
Which could possibly give us ability to make character names like in real Oldschool RuneScape, instead capitalizing only one letter after space.
We could use names with lower letters, and uppercase letters. I think a lot of players take their nickname into heart, and a lot of them want the nickname to look right. (Especially Pkers in PvP based server).