Well, it looks like you're the one stuck with the job, Jon.
However, I still would not label him a "false teacher" despite disagreements with some of his theology. I think he may have justification wrong, but I'm not sure it falls outside the bounds of orthodoxy. Even though he's an Anglican, he's operating within the framework of the Reformed tradition just barely alive within Anglicanism.
His view of "final justification" does not seem to be too much different from the orthodox Puritan Richard Baxter, who explicated his views in his battle against the Antinomians. (This is either a good thing or a bad thing, depending on whom you're reading. Either way, it is certainly within the Reformed tradition.)
One thing I think we should consider (and I am indebted to many authors for this) is that writers in every age are reacting to culture and prevailing ideas. (Or you could take C.S. Lewis' advice on the vaule of reading old books: It's easier to see their faults because we can discard their contemporary suppositions.) Augustine cut his teeth against Pelagianism. Westcott was dealing with large-scale apostasy with the Anglican church. Wright is responding to an atomized Christianity that often rejects community and defines the priesthood of the believer to be exercised within a vacuum. (My words, not his; he probably wouldn't even recognize that as a description of his beliefs.)
As to a literal reading of heaven, almost all of which comes from the Apocalypse, I cannot say I have ever read The Revelation of Jesus Christ literally, even though I was raised in that tradition. It is apocalyptic literature and should he read in that manner. You lose nothing in that; the overarching message is that the Father, of indescribable majesty, and his Son will finally redeem mankind and all creation, despite the powers of darkness attempting to thwart his will and his plans. To do otherwise, I am afraid, is to encourage obscurantism and wild theology and needless speculation that leads, in some cases, to heresies dangerous to the faith and to society.
Ready for the arrows now.