The keybind for setting a focus target on the HUD appears to be broken. I can click the pin icon on my current target's Target Info window in the HUD to set it as a focus target. However, using "/Focustargetset" or any key bound to that command will not work. This makes the Focus Target feature much less useful.
I've found a workaround for this problem: /Focus ""
To bind it, it would look like this in the command line:
/bind <key> "Focus """
That's focus, space, then three " in a row without spaces.
Found it by accident while trying to get /focustargetset to work. The /cmdlist shows a command called Focus with the following comment:
"Focus <name>: Sets the Entity with the matching name as the focus target. If no name is given, focuses your current target."
Took a minute to realize how not to specify a name without getting a missing argument error. When specifying a name, the quotes may be omitted.
The only problem now is finding a /focustargetclear equivalent. Looking through "/cmds clear" provided no help. Not a big deal, just an annoyance not to be able to clear a focused target.