I'd be interested in reading other scholars' opinions on the budding controversy, but I'm totally underwhelmed by this argument of Marissen's:
Handel’s music makes its own contribution to the troubling theological message here. The mood of the “Hallelujah” chorus is over-the-top triumph. For the first time in “Messiah” trumpets and drums are used together [in the 'Hallelujah' chorus], although they would have been appropriate or welcome at several earlier places.Huh? That seems almost laughably subjective.