It’s true that the ascension is a neglected doctrine. It was considered more important to earlier generations of Christians than it is today.
 One remarkable thing about the ascension is that it affirms Christ’s physical body went into Heaven following his resurrection. This is what the creeds call his “self-same body,” stating that likewise our self-same bodies will be restored in our resurrection.  

Someone can say they disagree with John 1:1 or that interpretation, but they are disagreeing with what the Bible clearly says. We know this because Jesus’ deity is evident not only in this verse, but also repeatedly in the gospel of John. 

In this clip from a conversation with Jay Rudolph on The Plumb Line Radio Show, Randy explains that God is the only way to get to Heaven. He points to John 14:6, where Jesus says that He is the Way, the Truth, and the Life, and no one comes to the Father except through Him.

This issue includes: "God's Providence in Joseph's Story—and in Ours" by Randy Alcorn, "Why Christians Don't Share the Gospel" by Greg Stier, "Joy to the (Grieving) World by Clarissa Moll," and more.