Adding honey malt in place of honey will change a lot about this beer. Not that that would be a bad thing. I love to experiment. What I believe it would do is 1) make less alcohol. Honey ferments almost completely out, and the sugar content of honey is higher then that of honey malt. 2) the beer will have more body than the original. 3) it will make a more sweet final product, which is what honey malt is supposed to do.
Feel free to try what you like. The beer I made benefits from bottle conditioning for a few months.