One promising thing about Perl 6 was the way it tried to bring parsers to everyday programming the way Perl popularized regular expressions. I'm sad the language seems to have stalled for that reason.
I'm curious, how did you get that impression? I'm one of the Perl 6 developers, and IMHO the regexes and grammars are one of the "killer" features. And I've also seen them evolve gradually, and have used them for various purposes. What gave you the impression that it has stalled? Is that the general impression on the outside of the Perl 6 community? What kind of marketing could we do to reach you?
If you wanted to keep continuity with the Perl line, then from the outset, it might have been a better idea to plan out a roadmap for Perls 6, 7, 8, and 9 rather than just Perl 6. "Perl with grammars" can be released and then you can move on to the next iteration. "Perl with grammars, objects, lazy evaluation, macros, junctions, optional static typing, and not just one but two kitchen sinks" will take upwards of 10 years to reach final release status. This has the benefit of increasing usability as idioms and common practices for new language features can evolve as each set of features is released. In practice a lot of this has been done for you ("Perl with objects" became Perl 5 + Moose).
Since that didn't happen, I think casual observers are suspicious that second-system effect has taken place with Perl 6 and that it may never really be done.