He is our Elder Brother who died for us so we can return to the Father.
That's not so complicated, now is it?
Of course not, but that's only one of the many callings of Christ. Sometimes I think we get so caught up in fights with Trinitarians that we lose track of our own doctrine, especially how it may coincide with theirs.
1 And now Abinadi said unto them: I would that ye should understand that God himself shall come down among the children of men, and shall redeem his people.
2 And because he dwelleth in flesh he shall be called the Son of God, and having subjected the flesh to the will of the Father, being the Father and the Son
3 The Father, because he was conceived by the power of God; and the Son, because of the flesh; thus becoming the Father and Son
4 And they are one God, yea, the very Eternal Father of heaven and of earth.
5 And thus the flesh becoming subject to the Spirit, or the Son to the Father, being one God, suffereth temptation, and yieldeth not to the temptation, but suffereth himself to be mocked, and scourged, and cast out, and disowned by his people.
Isaiah sounds practically Trinitarian, as does Amulek.
I doubt the scriptures currently available have more than half of the calling of Christ spelled out in them. We're often accused of diminishing the role of Christ, let's not actually start doing it.