I personally had the concave tweeter in two different versions, glas fibre and titanium. They widened up in lower treble, as seen in the soundstage measurement too. It is the purpose of this special design. I didn't like them.
Regarding the woofer, such peak in the mids is too typical as to not think of a resonance exaggerating the woofers HD at that frequency.
Upper bass is bad, too bad for me. Looks like chaotic behavior, means totally out of any control.
This might be an ok-ish offer, but really nothing to rave about as kind of a gold standard.
Btw, I don't feel the case of "absorb floor / ceiling bounce" is settled.
Focal doesn't use glass or fiber with any of its current home speakers (except for the 40th anniversary Spectral, which
measures very different from other modern Focals), so I'm not totally sure your experience with those really applies. The 'widening' seems minor and I'm not convinced it's not just a cabinet effect rather than native to the tweeter. From my conversations with focal it always seems the main purpose of the inverted dome is extending directivity control of high frequencies. They claim added rigidity and lower distortion and yadda yadda, but the extended wide directivity control is the only one that to me really stands out as rare compared to other drivers.
You can of course get slightly prettier off-axis measurements with a waveguide, but you usually sacrifice horizontal directivity width for it. Every design has its compromises, of course, but I think Focal's bookshelf speakers, at least, are able to make some choices others rarely do. Again, I struggle to find speakers with similarly wide and fairly controlled horizontal directivity up to 10kHz.
Your comments on the woofer are fair. It is worth noting that focal says right on its page that the speaker is designed for small rooms and a listening distance 'from 2.5m/8 ft,' so I think it's performance at 86 dB is more representative for the intended buyer.
While I do understand your criticisms, I think it's worth noting that at least three people here have preferred the Aria/Chora to the KEF R3, seemingly due to directivity -- and I don't recall hearing anyone saying the opposite. Small sample size, but perhaps notable. Despite the much lower price of the aria and far superior THD and bass extension on the R3. And I think the R3 is fantastic! But I think that suggests there's something to Focal's design goals. It also suggests that, once again, most of speaker preference can be boiled down to frequency response, directivity, and bass extension(which of course largely fixable with a sub).
Do not take offense to this, I mean this only out of curiosity: I've seen you criticize/critique many speakers here, but I'm not sure I've seen you suggest many viable alternatives. Other than going the DIY route, which is not viable for 99 percent of people, what do you suggest as an alternative that is similarly priced, similarly sized, and that maintains wide directivity characteristics? What speakers do you consider to be good? Especially speakers with published, well-executed measurements?
As you wisely noted in another thread, every design choice is a compromise. We each get to pick our own poisons =]