Let me first say I'm sure they will be high performance speakers, the design approach is solid.
However, I have a bit of experience myself, and of all the things that are important when designing a loudspeakers, IMO by far the #1 most important part of the final result is the drivers used. The drivers set the performance ceiling for just how good a speaker can be. It's the designers job to extract 100% of what's possible, but if the drivers are compromised you're throttling back the performance potential from the start.
With the Kii, the Seas DXT tweeter is a good tweeter but nowhere near the top of the food chain. I don't like their faceplate/waveguide design with the intentional diffraction rings to boost sensitivity and provide some directivity control. It works in those ways, but also introduces significant and measurable energy storage. And again IMO, time domain performance is extremely important in the overall perceived sound of a driver. If a driver, such as the tweeter used by Kii, stores energy it will obscure detail and tonal accuracy is compromised by the harmonics smearing together. And their woofers I don't know anything about other than they're aluminum cone, which given the fact that the tweeter can't go any lower than 1600-1800hz, would give cause for concern. Many aluminum cones of that size have problems crossing over that high, but I'd need more data before saying anything other than suspicions.
My point is drivers used make or break a speaker. In this case the drivers aren't anything to get excited about.