I only use acronym functiins in eval
I don't even use them in Eval. I can type findClientByName faster than most of you can probably type your first name (unless it's like Joe) just from repetition.
I only use fcbn in eval because of character limits.
What about servercmd packet limits or whatever
Torque has a good networking system. I'm sure it's parser would handle sending the message over multiple packets or something. But, to answer you more directly, I've never had an issue with it so as long as you don't go over the chat buffer limit it will send just fine.