And back in the room, to the OP’s point…
Yes, Never Mind The Matchlocks now available free with November’s Wargames Illustrated.
I’m slightly biased because I provided the photos for, and also took part in play testing of the rules.
But they’re a neat set with a very good flavour of the period. Like Billhooks, they’re superficially simple to play, but surprisingly sophisticated and tricksy underneath.
I don’t think they hit quite the serendipitous conjunction of rules and period that made Billhooks such a breakout hit. And the pike and shot genre is already served by many established rule sets (unlike the Wars of the Roses). But if you’re one of the many people who embraced Billhooks, you’ll find a lot to like about these (currently) free ECW / TYW rules too, and much about them will be pleasingly familiar.