I think the problem with customer surveys is that if the products you tend to offer represent a broader palette of options already, which is the case with DSI, people will start to feel entitled to ask for almost anything without constraint based on a plethora of individual needs. It's not only that too many cooks spoil the broth, it would also be impossible to make everybody happy in the end. And if you try to please too many, you'd run the risk of ending up with a workstation, where the emphasis is on "work" instead of versatility, meaning: too many options, too many functions that make sound design and the actual use complicated in the end. That's not really where the appeal of hardware lies, though.
The revival of anything analog - from instruments like the Monologue up to the reissued Minimoog - might only be partially related to the analog sound itself, which in turn is often based on personal tastes and in not to be underestimated cases on pure sentimentality. What all of these instruments have in common though, is a highly specialized range of features and sonic possibilities. In other words: I think what draws most people towards hardware - vintage or new - these days is a form of limitation as opposed to the endless possibilities you are being offered in the ITB environment. Plus: When it comes to the quantity of options alone, I don't think that you could design any hardware synth anymore that would even remotely be considered a serious contender for what you can do with just a laptop and a couple of dedicated controllers. Hence, I believe that the goal for a successful new hardware synth can't really be to fulfill a "do it all" approach. Its ease of use, a well laid out interface, and well thought out ergonomics are much more important in that regard.
As for more and more companies stepping into the analog poly synth market:
The positive side of the current situation is that it actually gives DSI the opportunity to move on while the rest is still trying to get comfortable. With regard to the Prophet '08, the Prophet-6, and the OB-6, DSI have pretty much "fulfilled their duty" on the analog polysynth market by now, so I couldn't see a better time for something completely different, which would make Behringer and the likes look like boring old farts.