There are many good things about oneness.
Be careful as some have twisted this to mean something different that the scriptures teach.
Such as the doctrine of Oneness of God.
Instead of teaching what is commonly referred to as the Trinity, they teach Oneness (Modalism).
This teaching says there is one God who manifests Himself as the Father, the Son, and the Holy Spirit.
Essentially they are teaching that this one is three.
The scriptures teach these three are one.
For there are three that bear witness in heaven: the Father, the Word, and the Holy Spirit; and these three are one.
1 John 5:7
This is from the Statement of Faith
The Trinity means that there is one God who eternally exists as three distinct Persons — the Father, Son, and Holy Spirit. Stated differently, God is one in essence and three in person. These definitions express three crucial truths: (1) the Father, Son, and Holy Spirit are distinct Persons, (2) each Person is fully God, (3) there is only one God.