I find the delay on the radial menu to popup, then select what you want to be a problem. I thought that maybe rebinding it from mouse wheel would help since it was shared with highlighting enemies, it still has that delay.
Calling enemies as a horde of poxwalkers is coming down a wall behind is pretty useful and teammates will respond to that call consistently. Id just like to able to bind individual calls like enemies, thanks, go here to their own keys.
Also no emperor voice call is a missed opportunity