Been there, done that in the opposite direction. My now elderly Harbeths have a presence 'dip' on and off axis, which would work quite well in a room like the OPs (my pal's dem room is 'lively' and they sounded exquisite there). The modern evolution of my speakers are flatter on axis and perhaps slightly better in lateral dispersion if not as 'we' would prefer.
Bare rooms with inevitable lively acoustics seem to be a domestic fashion choice these days, but go too far and the acoustics become dangerously close to 'bathroom' acoustics. That Focal tweeter is hardly a 'shy retiring type' either, especially on some older stand mounts at a grand or so the pair I remember, but some listeners think it's 'detailed' and of course, oldies like me with rolled off hearing sometimes like the seriously wild HF of say, a B&W or PMC domestic model which take 'treble exuberance' to a whole new level - deliberately it seems.
So after the above, what to do? A good thick rug would help a heck of a lot, and maybe a light voil or curtain dressing on the glass to the left of the rig (surely a cream or white curtain wouldn't interfere too much with the minimalist look and actually make the environment more 'intimate' in the evenings?
Finally and I'm going to say it, a speaker like the Harbeth C7-XD or M30.2-XD (main obvious sonic difference is mid to low bass balance), may well work superbly in a room like this, despiew looking old fashioned, as the equally old-school dispersion properties may suit the room acoustics better (so many owners of this brand show barely furnished rooms very similar to the OPs, often with equally tasteful minimal furnishing and ornamentation).
I liked the Kanta 1 I briefly heard, but found the Kanta 2 rather bland and 'all-one-level' with no real dynamics at all. Maybe it was the full-with Naim (Uniti Nova?) streamer it was connected to that didn't help either, I don't know...
Old experiences tell me that two pairs of speakers alongside each other will kill the sounds of both to a surprising degree, as the pair not playing may act as an absorber/kind-of-microphone as the diaphragms vibrate in sympathy with the playing pair (suggestions have been to short the terminals of the non-playing pair). In the OPs room, it'll loo a total disaster as well!!! Best sort the acoustics out on the existing pair of speakers if mostly non-computer based sources are used.
I also echo the vibes on the odd non-mirror stand bases - very strange and it'd get to me as well eventually...
I mention the Harbeths because I know the brand ever since it began and know most of the models as they've evolved (and evolved they most definitely have in fairness and without ever losing sight of where they started from)