Among other things, these interface changes allow for supporting pre-UUID Minecraft versions again. I may eventually backport older versions, but I don't know that I'll be able to lay hands on old enough jars.
Removed static access
Renamed all methods to follow conventions
Anyone who can use it has to be able to run the command anyway. If they can run the command, they can use tab completion to automatically fill in anyone online's name. There's no need to keep around a bunch of deprecated code for a function I sincerely doubt anyone actually uses.
Jikoo