Hello,
Ivan Louette and I have started to work on new custom predefined filters that should make filters use and creation a bit easier. It's not a full filters UI redesign, but only internal extension system based dialogs that provide easy understandable parameters to the existing predefined filters. Now that we have a minimal usable test set (25 available filters in Filters>Experimental), we'd like some comments on this project, and more specifically a *formal* approval that we are heading in the right direction.
The project has a Launchpad Blueprint (https://blueprints.launchpad.net/inkscape/+spec/custom-predefined-filters) and a specification wiki page (http://wiki.inkscape.org/wiki/index.php/SpecCustomPredefinedFilters).
We're waiting for your comments before going further. -- Nicolas