So, the early church seems to have been more in line with the Protestants, with the current RCC canon only being official after 393.
Erroneous. While the canon may not have been officially defined until a later time, the Church has always used the full canon of scripture. Jesus, the Apostles and the early Church Fathers all quoted extensively from the Septuagint, which includes the deuterocanonical books. See
HERE for more.
Also, as someone else already pointed out, it is surprising that you would look to the Council of Laodicea as authority. First because it is doubtful that the 60th canon, which lists the books of the Bible, is authentic. See
HERE and
HERE. Second, even if the listing of Scripture is authentic, it leaves off Revelation (which all Christians accept as divinely inspired) and includes Baruch (which protestants reject). So if it leaves out a book that all Christians today accept, its reliability regarding the remaining canon is brought into question.
Finally, if you accept the Council of Laodicea’s list of scriptural canon as authoritative, then you would also have to accept the other canons adopted by the council as well, which include support for the Catholic concepts of the sacrament of reconciliation (Canon 2), anointing with holy oils (Canon 7), implied acceptance of baptism as necessary for salvation (Canons 8 & 48), Recognition of Church hierarchy comprised of metropolitans (archbishops), bishops, and priests and organized into dioceses (Canons 12-14), daily praying of the Liturgy of the Hours (Canon 18), and the observance of Lent (Canon 45). I fail to see how these other topics addressed by the council (or more correctly the synod) are more in line with Protestantism than with Catholicism.