ZB’s interface has lots of optimizations for users with stylus’s that other 3D apps tend to ignore. For example, you can spin your model without pressing a key. You don’t need a middle mouse button unlike many other default interfaces. After logging thousands of hours with ZB’s interface, I can say it’s pretty efficient for the stylus user. I only have a couple of customizations to my interface (a couple of buttons and a plugin to make my Wacom touchstrips useful) which I spent less than ten minutes on. What I like is ZB doesn’t demand a mouse or tons of keyboard interaction (which is very distracting when sculpting.) Only a few buttons (on the tablet) and a stylus and its good to go. I find Modo, Maya, Silo, C4D all are very mouse oriented and require either a lot of customization or mouse/stylus switch-off.
I find that most of the negative comments come from those who aren’t prepared/willing to learn the efficiencies of the stylus-based interface. I’ll concede that ZB’s interface at times feel’s like someone designed a strange interface for the heck of it, but often, once you understand the underlying logic of the feature, the additional complexity or oddness makes sense.
Emulating another applications interface (and giving up the additional power in ZB) would probably be a mistake. Where I think ZB messes up is in poor docs, poor and incomplete context help, and not enough newbie startup info that gets people up and running quickly.
(Not to mention the buggy and incomplete product thing which drives everyone batsh#t a lot of the time. )
-K