Well, the IRC is more for instant help type of things, rather than thoughtful, extended discussion. If someone wants to dig into your filters, you might be gone by the time they finish investigating. I'm not saying specifically on the mailing list. I was just trying to think of the best way to show what you've been doing. Maybe the gallery on the website, except there could be some size limitations.
If you don't want to get too involved, just post a link to some of the amazing filters, on the user mailing list. Or again, I could do that for you.
But! With your comments/complaints about the editor..... If you have any suggestions how to improve the editor, that is clearly a Launchpad type of issue. You could link to a few of your filters which test the limits, and post exactly the comments you just made, about most users not being able to figure it out, to be able to learn from looking at your examples. And if you were to make a mock-up of a better editor -- Wow, I think that could really be well-received! If you could make a mock-up, that could even be wiki content. There's a way to use the wiki to make a proposal....I can't think what it's called..... well I think it's just called a Proposal, here are examples:
http://wiki.inkscape.org/wiki/index.php/Category:Proposals.
That's the kind of thing that developers like to see. You could always explain that you can't do the actual coding, but you'd be willing to work with devs who can. (Or maybe you'd want to learn about coding for the gui?) Maybe there's a developer who is looking for new project, especially since 0.92 is about to be released. Maybe it's a good time to start a discussion? I know there's been a push to create a group who are interested in gui-related issues. And that's what this is, right? The function of the filter editor is fine, it's just the interface that needs improving -- right?
Well anyway, I think there are 2 ways your work can help the project - one to show the power of Inkscape filters, and 2, to suggest a better interface or dialog (assuming you have suggestions). You could post on the mailing list, with links to the most powerful filters, as a way of kind of "testing the waters". And if it looks like there's some interest, you could go ahead with putting a mockup in the wiki, and a Launchpad report.
But again, just some thoughts