There is an interesting discussion of Deuteronomy, Josiah, the temple, and the theories of Margaret Barker on Interpreter.
1- Ben McGuire, “Introduction”
http://www.mormoninterpreter.com/josiahs-reform-an-introduction/
2- W. Hamblin, “Vindicating Josiah”
http://www.mormoninterpreter.com/vindicating-josiah/
3- K. Christensen, “Prophets and Kings in Lehi’s Jerusalem and Margaret Barker’s Temple Theology”
http://www.mormoninterpreter.com/prophets-and-kings-in-lehis-jerusalem-and-margaret-barkers-temple-theology/
There are a number of comments on the articles as well.
D. Richards, has added his views as well:
http://daversramblings.wordpress.com/2013/05/04/defending-deuteronomy/