What you describe sounds completely correct. Focal speakers are very treble forward speakers and MacIntosh are very midrange / bass heavy… details light. The combo probably sounded good. Your Sonus Faber are very natural sounding with very midrange revealing speakers, your Luxman is very trebbly with a fair amount of slam… kind of bimodal with emphasis on treble and bass.
That sounds exactly what I would expect.
Mating a Luxman… you want very relaxed / warm speakers or they are going to sound like the midrange is sucked out. Not a good combination unless you want copious quantities of detail with bass emphasis. If you want musical, fleshed out… well, neither Focal or Luxman are the ticket.