The Connect Walls command only works on 1 wall at a time. If the users need to extend multiple walls to touch another wall, the user must click the same wall multiple times. We should strive to match the workflow available in the Trim to Element C...

It would be a good idea if in a drawing you could override part join configurations and create a new configuration for that drawing. For example, join all the walls, pillars, partitions, etc. in a floor plan or only join the walls of the same mate...