Nice! I love Goya's work, albeit mostly his (much later, though thematically similar) black paintings. This is a very good and appropriate choice of homage, and very well done to boot.
The characters are all nicely modeled and look convincingly insane. Maybe not quite as psychotic as in the original, but really, who could possibly match THAT?
I can understand if you're not satisfied with them, but I think they work just fine.
(For the texture, BTW, I suspect you'd be better off overlaying a good grunge/cracked texture than playing around with filters -- those end up waaaay too regular, IMO.)