Alright, sure! I wasn’t sure what part which part of the specification was still WIP 
. Is there another place where you gather feedback like this, or is a forum-post like this the best way?
Anyway, I think any “hard constraints” are not even required. The CiA 103 spec only briefly mentions this 120 Ohm cable-impedance once, so I think this might be a good example. Users are of course still free to ignore these specs if they feel it’s not required in their application.
Also, I think table 7.5 is only valid if this cable impedance is correct, so a quick mention can’t hurt.