Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure.
Off board artillery (radios) cannot fire smoke. Is that correct?
Correct. As I've said in other threads:
In my reading and other research I got the distinct impression that artillery-laid smoke screens were used far less often in the PTO as compared to Europe. So it was an easy design decision to get rid of the capability altogether for CC. This comes with the side benefits of (a) making the rules a bit lighter and (b) requiring fewer smoke counters.
Of course the door is still open for future CC scenarios to have a special rule allowing smoke-making capability via radio should the specific battle being portrayed require it. But I felt that for CC the default setting should be "off".