I think Simiel is correct in what he is teaching us about Jesus, I think he just has a hard time explaining it. Let me try to explain it (and forgive me if I am misinterpretting you Simiel and feel free to correct me where I am wrong.)
Okay now let's all look that we all agree Jesus is the Son of God, he had the Holy Spirit of God, etc. We all agree on this and this is good starting point. So let's build off of what we all agree upon that we all might then come to better understanding.
Now Simiel's main claim I think that disturbs you all (and I admit it even made me wonder) is that we can do things like Jesus did like for instance healing people. Now see here is the thing, Jesus Himself said we can heal people and do all those wonders. That is not unbiblical and I don't think anyone argues against this. I think what everyone's concern here is that if Simiel is healing people, is if he is doing it in the name of Jesus as Jesus said we should. So anyone that claims to heal in the Name of Jesus is not nessecarily a liar and they should be considerred not cast aside immediately. (Not saying you shouldn't weigh them, look I weighed Simiel myself. Like Arwen has done a good point in pointing out is though healing powers is real, some people do in fact try to use them to teach another Gospel, which is of course bad.) But don't cast aside the people too fast now because if they really are healing people in the Name of Jesus in accordance to the Gospels then we should be thankful to Jesus for helping people even in our time today.
I think it really comes down to this reoccuring topic. Was Jesus God and how did He prove it? See all the miracles like turning water to wine, healing people, casting out demons, etc. are in fact not proof at all that Jesus was God because Jesus said we can all do the same (in His Name mind you.) And of course the Apostles and such who were trully human like all of us did the same, but we know none of them were the Messiah, but rather acting in His Name.
Now Jesus was in fact human. I think what Simiel means by Him leaving His deity behind in Heaven is moreso him trying to express that God didn't come down to earth in his grand awesome glory because if you refer back to Exodus 33 when Moses got to see God's back parts, God even tells Moses that if he had seen God's full glory that Moses would have perished. Thus Jesus was God in human form if I might coin such a term, because otherwise everyone that saw him would have perished immediately.
Also remember God came to us as a human in Jesus because He had to save us all and the only way that is possible is if He came as a human to sacrifice Himself because obviously God the Father (or God's godly form) cannot die or be harmed in anyway possible.
So since we know Jesus was God in human form, and we know none of his supernatural miracles are proof that He is God, let's ask ourselves this question. How can we prove Jesus was God? How did Jesus prove that He was who He was?
Now hey this can be a kind of fun exercise in faith and understanding. Understand through his words and life story Jesus proved this to be true in literally hundreds of ways. So let's all have a little exercise in Bible Discussion and instead of fighting show our testimony of our belief in Jesus. I ask you all to give one proof that lead you to believe Jesus is God.
My personal favorite proof is one that is often the most misinterpretted.
When Jesus was on the cross Jesus asked a question. That question is "Father why have you forsaken me?"
Now a lot of people think Jesus sinned here, thus the misunderstanding, but they are incorrect because Jesus could not sin. Jesus merely asked a question to His Father. Furthermore Jesus asked a question on behalf of all humanity. This is a very human question too that I think every human asks at one point or another. Also mind you Jesus then said "It is done." Thus signifying He had fulfilled His purpose and laid the contract before humanity which God signed in blood.
Now what people often forget is the Father's answer to the Son's question. That answer is the Resurrection. That answer is that God did not forsake humanity. That answer is that God is Salvation and God is With Us. Thus it is that question and that answer is God's eternal promise of Salvation to all those who believe in His only begotten Son.
So that is my proof that God is Jesus is the Holy Spirit. I am very curious what you all think too or what made you all believe Jesus is God. Let's have an exercise in how we all know Jesus is God without any supernatural miracles required.