Oh dear, I think I may have been a bit off the mark with my reply. When I saw the code you posted, I thought you wanted to actually modify the extension yourself. If your comments to them were simply to suggest changes to the existing extension, they were probably mostly ignored.
It's my understanding that proprietary software is developed according to users' requests, because after all, that's how they sell it, by making a product that satisfies their potential customers. But open source is a different process entirely. Because Inkscape is an Open Source project, the development team is largely....if not entirely composed of people who have particular interests, and choose to spend their time developing that particular interest. I suspect (although I'm not well informed about this) if you were actually modifying the existing, or writing a new extension, and asked for help, I wonder if that might get more attention?
I don't belong to any Inkscape mailing lists, so I don't know why you haven't received any replies. Maybe because they don't know you? Or maybe someone intends to look at it later. I'm really not sure. But you can still proceed on your own. I wonder if you submitted a finished product or even finished prototype, that might get someone's attention. Then they could test it at least. Or maybe with a little research, you can find out who authored that extension, and contact them? Here a forum member interviewed the Inkscape team. Maybe you could learn more about it:
viewtopic.php?f=21&t=5925&p=25589#p25589 Ummmm.....I''m not so knowledgeable about this, but I do know that people create extensions for Inkscape, and make them available for download, all on their own. I think if they are deemed worthy, they may be added to Inkscape. Just as an example, someone has been developing a different extension, and asking for input from the forum. You might contact them for info about the process??? I mean, since they're a forum member, they might not mind you contacting them, via PM? Here's their topic:
viewtopic.php?f=11&t=5943And if you're serious about it, here's the Inkscape Wiki page about development, especially I would suggest looking at the developer manual and tutorials:
viewtopic.php?f=11&t=5943But if you just want to suggest the changes to that extension, the proper place is Launchpad, the Inkscape bug tracker (
https://launchpad.net/inkscape). You can submit your suggestions as a new feature or wish list "bug". I'm sorry if I sent you down the wrong path