There is love in unity and therefore love in sharing whatever the Father has revealed, that all may be completed in Christ. But if anyone does not recognize this, he is not recognized. No saint has yet come back to perform miracles and healings in order to be canonized into biblical or extra-biblical sainthood. The Holy Spirit heals people. Evil spirits also impart physical healing.
Saints can heal people through prayers in the Name of Christ Jesus.
Healing, in another word, is no big deal. The dead need not perform healing when those that are alive are doing it. He was not appealing to dead believers. Col 3v12 - the elect of God are holy and beloved. In Eph 3v5 - the apostles are described as holy while being alive.