It's interesting to compare how things have changed. During the first "wilderness period," Mojo did a short interview with Messrs Whyte and Boorer during the Royal Albert Hall/Janice Long 2002 campaign. Boz mentioned submitting a demo of The World Is Full of Crashing Bores with a small piano part, which Morrissey said was "unnecessary." Not two years later, the recorded version comes out with a slew of piano and he begins to tour with a keyboard player. He has done since and both Farrell and Manzur clearly created a series of new sonic opportunities. When he did the first gigs of 2004, it was sheer cognitive dissonance to even imagine a keyboard riser on stage with Morrissey. But he clearly is not intending to go back to a two guitars/bass/drums model.
I do find it amusing, though, when the band plays an older Smiths or Morrissey number that doesn't require keys, doesn't contain a part that can replicated/mimicked on keys, or doesn't have a brass part added and the player is reduced to supplying extraneous percussion/acoustic guitar just to give him something to do.