They can easily abolish JC if thet want. It's not scriotural. They can also say, "after further review, the ruling on the field has been overturned. Judicial committees are not theocratic. We will be updating to a new "theocratic" method after 60 years in the same manner we just did with elder appointments. touchdown JW.org!"
I see them eventually making DF ing a personal matter, enforced by elders in the same way dress and grooming is enforced by elders. Those seen hanging with weak ones will not get privileges.