The "debate" appears to have ended with the Council of Nicea, as I mentioned.
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...As the church separated itself from the Hebrew root it was grafted into, pagan practices began to quickly infiltrate it. With the victory of Constantine in the early 4th century (300's), the paganization of the church accelerated rapidly and was given the official state seal, protected and enforced by law. Overnight Pagan temples became churches, and former pagan priests became "Christian" Priests. Statues of Jupiter, became Peter, others represented other saints.
The Council of Nicea & Imperial edicts sealed pagan practices, with Shabbat now being outlawed (replaced by the day to honor the sun god, called Sunday, not to honor Messiah) and the resurrection celebration (originally 3 days after Passover) moved to the pagan celebration of Easter.
http://www.hebrewroot.com/pagan_origins_of_easter.htm
You indicated that Constatine was the source/beginning of Christians celebration of Easter. That's not true.