We have and largely accept, the virtues of a national curriculum. Do we really need an infinite variety of tech carefully tailored to each individual school's needs to deliver that curriculum? A post code lottery is fine there, but not here? There's obviously a compromise somewhere, especially given that "carefully tailored" includes some rubbish systems, and presumably enough for ICT to get spot-welded to BSF in the first place. They[tm] got clean away with that "should be like turning on a light switch" slogan. Why?
if you want to stick with simple, a standard template for IT, no change ... then surely you are advocating going for a managed service.