Swing excesses apply in either case of the body swing and the up-swing.
Though I must say that I've seldom seen dancers who produce proper body swing from the standing foot overdoing 'CBM', without being immediately aware of the effect this has on their musicality or control over their weight transfer. In this context the CBM reaction comes from a clear intent. The most common fault is the separate twisting of the top action superinmposed, but not integrated, on a forward step just because the step is described in some text as having CBM without fully understanding the action.
Another point I think that requires mentioning is the 'swing' of whatever type used in ballroom is a much more controlled action compared to the swing of a golf club or the swing used to kick a soccer ball. I think this prompted a world champion of the recent past to say that 'swing' is an overrated concept. Anyway, at no point does one simply throw the 'side' or throw the 'hip' and simply catch the weight on the receiving leg. The weight is under full control when it is over the leg but also every transfer of weight effected through swing is under full control as it is sent from the sending leg and received under full control onto the receiving leg. It's about balancing being restrictive with being out of control, the mark of a really good dancer.
