Running like KC is far from the power of IS Boxer.

You could break repeater, so you have one version for keyboard repeater and another for mouse repeater.
Then have keyboard repeater on, all the time.
And mouse off, unless you toggle it on.
Run with Keymaps off.
And use the Blacklist/Whitelist.
That will be very close to Keyclone.

You'd be better off with Keyboard/Mouse repeater off, by default.
To set hotkeys for mapped keys, and run with Keymaps (groups of mapped keys) on by default.
Any key that you push with KC, that you want to go to all clients, make a mapped key that broadcasts to everyone on the same keybind.
But you can then have the slaves only (Window: All Without Current) do things, no need for whitelist/blacklists.
You can put toons into Action Target Groups, and use those as the target for whatever.
You can have a spread out macro, while everyone has the default in-game movement keys.
Mapped Keys are far superior.