The Church has never, and cannot, "improve on Jesus' parameters" on matters that are part of its divine constitution. There are seven sacraments, not six, not eight. The matter of the Eucharist is wheat, not rye, not rice.

Jesus chose male Jews since He was Jew and came to the Jews. "Salvation is through the Jews." Within his lifetime there were gentile disciples, and within their lifetimes the Apostles were ordaining gentiles.

On the other hand the Church always and everywhere treated sects which ordained women as heretics, accepting their male clergy into the Church if the sect became orthodox but not their female, and never counted deaconesses among the clergy.

Celibacy is really not relevant. It is a discipline with roots in the Apostolic age. It can be dispensed with since it is not an intrinsic component of Holy Orders.