in·no·va·tive: (of a product, idea, etc.) featuring new methods; advanced and original.
yep, all those features fall under this definition. They create new workflows which cannot be fully replicated in other software. Ok, zmodeler doesnt count here, although it still has some tricks up it
s sleeve.
who think zbrush is perfect the way it is.
Who said it is perfect? It`s strength lies in sculpting and modelling scope, and all those features (innovative or not) are centered around modelling/sculpting pipeline. It seems logical to me (hopefully to Pixologic too) to continue current trend and not bother much with other features down the pipeline, most of which are much better covered in other software.