Espresso in Italy is pretty uniform, but I don't think it is true to say that it is all Illy or Lavazza. Its just pretty much of a muchness (heavy on the Brazils, with a dose of robusta for the gloop factor)
I like it. But I also like, and prefer, more complex flavoured single origin coffees. What I don't like are bright coffees put through an espresso machine. In milk its a different matter, the Italian stuff gets lost, whereas the brighter stuff is tamed and the flavours develop with dilution....bit like putting water in whisky.