I think the kit is great - keep the WWI heads for sure, a box of these zombies should be an instant add-on for anyone interested in the "Last War" boxed set!
I think the hardest heads to make a case for keeping might be the Napoleonic and 18th-century tricorn hats, but even there, I think an easy case could be made for the tricorn heads at the very least being used for a horde of zombie pirates, and I'm pretty sure there's a fairly popular black-powder era horror miniature game out there with room for 18th- and early 19th-century zombies.
In the comments for the WA News update announcing the zombies, I saw another complaint a few minutes ago about the nondescript rags being a little TOO nondescript, supposedly making them a little too bland to work for any specific setting, but the heads and arms look great on historical bodies for anyone willing to kitbash these zombie bitz against their favorite Wargames Atlantic historical sets. Just paint the shirts and trousers of the historical bodies in faded and muddy cloth and rusted or tarnished metal, with zombie rag sleeves and hats to match, and you're golden - and no reason you couldn't mix in a few nondescript rag bodies just to sell the zombie horde illusion!
And for sci-fi gamers willing to put a little beginner-friendly modeling work into it, I bet these zombie bits will mix well with boxes of "The Damned" or "Cannon Fodder" - and just as well with Star Grave kits - for hordes of post-apocalyptic sci-fi zombies and mutants....
So, I think the biggest complaint for most customers is easily fixed with the most basic kit-bashing with any WA kit that suits the era you're gaming in - not perfect for anyone who wants to buy one box of zombies and nothing else, but easy for anyone who doesn't mind spending a little more for donor bodies, or those of us with hard plastic multi-part kits and bitz to spare in our unbuilt, un-painted piles-of-shame. I'm betting that'll be most of us who've been doing this a while: you can't make everyone happy, but there's no reason this set couldn't make many - and probalby most - of us happy.
My only "complaint" would be that the selection of heads doesn't include anything especially exotic, beyond the great selection of historical era hats: the only thing that could make this set better for me would be some mutant and alien heads, alternative monster faces (vampires, goblins, ghouls, "evil dead" deadite demons, and what-not), eerie masks (hoods, flour sacks with eyeholes, jack-o-lanterns), long ragged hair, and so on - but honestly, that sort of thing is probably best left to STL files, if not simply left to my resourcefulness in sourcing or inventing the bits myself, since most customers for a zombie kit are probably just going to want to field a nice, quick, simple horde of generic modern Zombie Apocalypse zombies, or a horde of generic fantasy zombies, and call it a day - the non-"generic"-fantasy-friendly historical heads are just a bonus for the rest of us! So, my "complaint" is small stuff, and it doesn't affect my positive final score for this set.
With that in mind, a box of these zombies, combined with a box of WA Goths or "Partisans I" for fantasy or sci-fi gamers respectively, will probably make about 80% or 90% of the target demographics happy, while "Last War" gamers will surely want to grab a box of these zombies to go with the boxed set for Weird World War zombies/mutants to cover almost all of the rest of the customers for these zombies!
Additionally, I really REALLY appreciate the efforts made to keep this set flexible and versatile enough to be used for so many different settings, and i also REALLY REALLY appreciate the effort put into making some pretty spooky looking zombies: the competition seems to go for somewhat cartoonish zombies, but this set looks pretty mean and malevolent - I love it, these guys should really fit the bill for a proper horror setting.
Seems like a winner of a kit to me! 🙂