A good strategy for system building is to get a loudspeaker that at a minimum doesn't have to fight your listening room. The Focals with their broad upper midrange and treble dispersion are at war with your extensive glass room. As an alternative you should consider loudspeakers with controlled directivity design, or even full blown DSP laden powered loudspeaker systems like Kii or Lyngdorf Steinway.
BTW, I like your drone video of the apartment.
BTW, I like your drone video of the apartment.