I bought a returned Wavestate at an irresistible discount a few months ago. The build quality is plasticky and feels cheap. The keyboard is limited and Iād perhaps have preferred the combination of a desktop version and a large controller keyboard. The sound is like a great VST (I had the wavestation VST before this). The panel interface is mostly very well laid out; I found it easy to figure out basic functions without using the manual. It has a wonderful modulation system with all sorts of fluid movements. The joystick (on mine at least) has the minimum friction needed to stay where you put it; you could move it by blowing it. I donāt like this because Iām clumsy and my hands flail all over the place, like an escaped hose.
I donāt like scrolling through the little menu and this has been the main cause of my procrastination in getting to know the synth. I ended up putting it away in a cupboard (in my defence, I have extremely limited space). I desired this synth because of the 80s and 90s bells and crystal sounds, but I havenāt found much of a musical use for them yet. Iām too involved in manipulating samples. Nowhere on my eurorack do I have a screen or any menu to navigate (unless you count the sample banks of Radio Music, or the Gotharman LD3, which I tend always to route to and from eurorack). This is to get things going as quickly and simply as possible. Itās made me very lazy about getting to know any other desktop stuff.
All in all, Iāve not really answered your questions and instead digressed about personal shortcomings. I can at least say that wavestate is quite deep and quick to patch and good fun.