The problem with Reinstating™ someone who has been Disfellowshipped™ for sexually abusing children, is this:
Following the model of first-century Christianity, Jehovah’s Witnesses have no clergy-laity division. All baptized members are ordained ministers and share in the preaching and teaching work.
An "ordained minister" is automatically someone who has a measure of trust within a congregation. An "ordained minister" is someone people respect. In the case of young children, parents generally afford much higher levels of trust to someone who is a bona fide member of the congregation due to the assumption that all members are "ordained ministers".
Therefore, it does not matter whether a person is appointed as an Elder™, Ministerial Servant™, or Pioneer™. The fact that a Reinstated™ person is permitted to re-join the ranks of "ordained ministers" with all the rights and Privileges™ associated with that, regardless of any court mandated restrictions (such as not associating with children), puts vulnerable people at risk.