When I was asked recently to review the cd reissues of the recordings by the Virtuosi Brass Band I was struck by how dated some of the arrangements seemed, and came to the conclusion that one of the main factors in this was the limited use of percussion. Even in the marches, they were limited to two players, whereas a third wuld have enhanced the effect so much, never mind the absence, by and large, of much in the way of tuned percussion.
Percussion, used sensibly, can greatly enhance a band, widening out the options for the composer and arranger, and introducing a whole new range of tone-colours. As others have said, in contesting, especially in the lower sections, we still seem to be in a no-man's-land when it comes to percusson: until they are treated by every adjudicator as an essential part of the band, with the absence of their contribution being treated much the same as if a euphonium or cornet solo were missing, it is going to be hard to motivate bands to recruit and keep good quality players.
The percussion are also very often treated harshly when it comes to the time spent setting up the platform, when there are often other factors causing delays. As to the other part of the letter where he suggests all bands should use the same formation then that is unreasonable - each MD should be able to position the band in the most effective way to present their concept of the piece in question. In this respect, however, I do think their could be a time limit set, and rigidly enforced, to prevent any unnecessary delay in the changeover between bands.