The clip and slice filters have the crinkle option, but in python they are separate flags with separate names (Crinkleclip & Crinkleslice) which are basically the same (at least from behavior perspective). it would be nice (and cleanner) if the option becomes ‘Crinkle’ for the two.
Sure, that should be easy to do. Do you want to contribute that into ParaView ? 
is it python programation? if yes i can dig into it (is there any guide for contributing?), but if it is C++ i would not be of much help…
It is mostly XMLs and python with a bit of C++, but you would need to compile ParaView yourself.