Make celibacy optional for diocesan clergy in Brazil? Why not try it! (Of course, marriage will rule out their being made bishops some day. In line with Orthodoxy and our own Eastern Catholic Churches -- and even with the recently created Personal Ordinariate of Our Lady of Walsingham [for former Anglican bishops and priests] -- married men aren't ordained bishops. Instead, candidates are drawn from religious communities/orders like Pope Francis's community, the Jesuits.)
But Brazil seems like the perfect place to start making celibacy optional for diocesan clergy or diocesan candidates for the priesthood.