From what I understand, me and all the other modders have hit a brickwall in terms of new releases. At this point, very little has yet to be done in regards to DayZ, and its plausible settings, and environments. And also ArmA IIs engine and what can be achieved 'efficiently'.
We're really scraping ideas from the very rusty bottom of a barrel. A lot of them are very similar to other, already done ones. The ones that have yet to be done are usually far out of reach, requiring extensive recoding or an inflated amount of time to design.
Less updates is also to be expected, as people shift from ArmA II to ArmA III and DayZ standalone (the game is still shit lmao), or just lose interest.