I revisited the store to double-check my observations regarding PX8. Boy, they look stunning, and even 2h session was super fine in terms of comfort to me. The form factor of these is just worth more than the asking price. I love them. I also saw the 007 pair, and they are in the same league as Focal Clear MG in terms of the WOW factor.
Sound-wise though, to me these ( apart from resolution and smoothness ) sound like 250-350 Euro Bluetooth headphones. I know, I know I hear a majority saying that it's "like it or not". Maybe so, then It's the fact that I don't like the presentation. You are right. But to be more precise:
1. It's not the amount of bass. No, not at all. I found it quite cool actually, and without ANC, super effortless. Splendid. But once ANC is on, I do hear a massive change in behavior. At first, it does sound just stronger, but I focused on that more, and I do feel it is different. It hits harder, but the bass reverberation is shorter, giving it a forced feeling. With ANC it sounds artificial and not so fun. Without ANC? Rather nice, I don't mind the lack of detail, as long as it rocks my boat. But then, well, these are the ANC headphones.
2. Mids are odd. Yes, odd. I do feel a LOT of DSP work there. It pulls some extra echoes and reserbations to make it sound bigger, but the result is that with upper mids/ treble compression, it gives me a feeling of distance and in-chamber presentation. Some rock tracks sound good, but say, older Genesis or Phill Collins sounded bad and disjointed to me with high hats being so flat and odd echoes around Peter's voice. It really sounded like a forced Room DSP simulation and compressed high hats.
I think my initial muddy bass comment was related to that odd ANC bass behavior and to my ear's oddly tuned mid-tones.
3. If a track is mostly vocal, it does sound good actually. This extra warmth is cool. But when the track gets more complex, I hear the lack of energy in the voice region, and with the extra presence of lower mid-tones accented by this pushed-forward reverberation, I totally don't pay attention to the vocal that lies in upper mids.
4. Highs are pushed somehow, but with - to my taste - recessed or compressed upper mids, they do feel shouty at times and flat.
In general, I liked the sound for the first one or two tracks, but the more time I spent listening the less I cared about the next tracks. I remember owning PX, I dreamed of having BW headphones with better comfort and similar looks. PX8 are just that, I ADORE their looks and comfort, and I respect their not-bad resolution and super classy smoothness, but that tuning do me sounds very much like a typical consumer one, one that does not match the asking price. I would love to love them. Really, and I envy all of the owners that find themself happy with both aspects of those amazingly looking headphones.