Yeah, in general I'm not a fan of big 2-ways. I'm probably not the only one who generally thinks that a 6" is usually about the limit for a good 2-way. The Quested H108 / V2108 is one of the few 8" 2-ways I like, and that's probably because the Volt 8" drivers are unusually well-behaved at higher frequencies, so it can be crossed over in a reasonable place for a 2-way. There aren't a lot of 8" drivers with good low-frequency capabilities that can be crossed over high enough for a regular dome tweeter.
Still, when it comes to midrange, I really feel that there's no comparison, and I know a few people (who's opinions I very much respect as being worth a lot more than my own) who will say that the obsolete Quested VS2205 has an even better midrange as a result. Of course, this is not a Quested thread, and even if it was Audax discontinued the woofers that were used in the VS2205 a long time ago. I'm not really sure what happened with Audax, though it's unfortunate because they made a few different drivers that I really liked.
The ATC and Volt dome midranges have excellent performance as well, but at a cost... the Volt is about a $600 midrange driver, and the ATC won't be any cheaper.
Now, the JBL seems to have taken the route of a very low crossover frequency of around 800 Hz, and they get that by using a compression driver with a large horn. Whether that's a better compromise is up for debate.
From my perspective, if I were designing an $8000 speaker my preference would be to avoid pushing it. I'd probably go for a 3.5 way - which is what Quested did with the 3208, though my implementation would likely be different. This may not have been an option for JBL, a company that likely expects a reasonable profit margin, and the VH3208 is a pretty costly speaker to build, even with Quested's rather minimalist (and that might be giving them too much credit) cabinet finishing solution.