The people boxing/botting in most games (FFXIV, WoW, etc) are doing so for resources, typically. The people boxing in games like EQ (or games that wish they were EQ, ie, Pantheon) are doing so for progression. There is a stark difference in utilization between the two.
Why would you not use those terms? Botting is using third party tools to automate repetitive activities in a game, and boxing is having a second (or multiple other tiered accounts) to fill a subset of class requirements that normally real players would play.
EQ (and games wanting to be EQ, including terrible design decisions) very heavily favor people boxing other accounts. There's nothing/little to bot, as content is mostly unsoloable, thus botting doesn't matter. Boxing, however, is a legit term.
You're apparently a game designer guy,
Daidraco
. Why would you not use these terms, and what terms would make more sense? Because the spirit behind those terms remains the same.