Re: Necromorphs/Cult of Death in flavor, rather than name...
Ah! My mistake, good to hear. Anyway, regarding megabeasts, are Shoggoths and other Lovecraftian horrors already set up to be included? This might also be an area in which Gamma World might help as it has loads of beasties that would fit the bill, with the one significant drawback being that they could be a little esoteric (although a fantastic Easter egg for people familiar with the setting).
I have not tried the Ponies Apocalypse mod, but I got the impression it had miniguns with integral ammunition which sounds like an interesting concept and that you may/would be incorporating elements of that mod into yours. Oh, and I dunno if these are something you already have planned, but I really like the Sawmill in Masterwork that allows logs to be sawn into 2 logs of lesser quality, and the Brick Oven that permits effectively changing stone into bricks of a different color. And, if I were to mention everything on my wish list, I really like the idea of premium drinks: whether upgrading drinks already brewed (changing wine into brandy, for instance), or incorporating additional reagents to produce drinks that give additional benefits or are simply higher quality and give happier thoughts. And, another, would be additional optional hostile factions for those of us players who like a little more conflict -- it wouldn't even be a problem if they shared current graphic assets (e.g. like a different faction of raiders).
Finally, do you have an ETA in mind for the next release? I might actually give the Pony mod a try (although the Pony aspect turns me off a bit) in the meantime, for ideas and whatnot.