It would be useful to be able to set up quick PM recipients, for a faster and efficient chatting. Example:
/set 1 Sasino97
You have set Sasino97 on quick PM 1.
/1 hello, what's up
equals to
/pm Sasino97 hello, what's up
As a minor suggestion I suggest to add a /m shortcut for /pm, since many players from other servers are very used to it.
I didn't make a different thread for this one since it's very insignificant.