The term 'shun' is used as late as 2006, but never is directly applied to those who are 'apostate' or have just left the organization. Yet the impication is implicit in the way they use the term. Clearly jw's would have no problem making the jump to the conclusion that disfellowshipped persons would be included.
I suspect that most jw's will continue to think in terms of disfellowshipping for a long time. Case in point, even into the 90's I recall some older Witnesses using terms like 'Jonadab', and most of us who did not use the term in our generation still quickly understood the meaning.
I think the 'phasing out' is likely legal - but custom within the congregations will continue the use [and spirit] of the word for a long time.
Jeff