Kayley, that does remind me of something worth mentioning: multiplicative stacking of keypresses.

For example, if I press "1" 5 times per second, and "1" has a keymap that sends "1" to all clients, I end up with 5 keypresses per second to each client.

If my "1" keymap sends keys 1-5 and "f" to all 5, I now have 35 keypresses per second to each client.

If my "1" keymap is also set to trigger on press AND release, I now have 70 keypresses per second to each client.

Now, imagine I'm using the Pro setup. My "Paladin doDPS" mapped key is set to fire when pressed AND released, and:
* calls Paladin doDPSAbilities (keys 1-8), which is also set to fire on press/release
* calls Paladin doSelfHealThingies (3 buttons), which is also set to fire on press/release
* calls Paladin protGearMacro,

I now have one button that, if pressed 5 times per second, effectively sends 240 (!) actions per second to each client. Multiply that by the number of clients and...well...

If you have some PC overhead, you're probably OK but I'm sure it is fairly obvious what starts happening if you are...promiscuous with your "referred" mapped key presses, especially on a system that is heavily loaded to begin with.