@Yohann_Bearzi you keep bringing up very interesting problems and may feel that they are not always greeted with enthusiasm. It is not because these would not be excellent ideas, just that there are many other things to improve in VTK which has a much better cost/benefit ratio and makes much bigger impact.
For example, what do you think about focusing your efforts on bringing in more essential features into VTK, such as:
- make available this awesome geodesic path search method available as a VTK remote module
- make available vtkbool Boolean mesh operations as a VTK remote module
- make it easy to distribute VTK remote modules on PyPI
- make more VTK classes compatible with arbitrarily oriented images
- look for problems and enhancement ideas on the VTK issue tracker and work on those that seem to be pressing issues (it could be also useful to discuss the idea here before investing time into implementing it)