I'll give my two cents here, but I'll leave the bulk of answering to the project heads. First off, I want to thank you for approaching this with the level of respect and friendliness that you did. I'm more than happy to have a discussion about this with you.
Simply put, while it can feel like the game has been stagnant as far as developing goes, this isn't quite true. AR has gone through quite a number of changes just in the time that W3D Hub has existed, much less the length of time that I've been with the team, or even the full life of the project. These aren't small changes either; the unit roster has been tweaked several times, and there's been quite a few mechanics implemented, toyed with, and proposed throughout the years.
There's also the unspoken fact that APB Delta was quite a game changer. No longer does it feel right to release a game that is more-or-less a reskinned version of Renegade. It has to know what it is, show a lot of polish, and truly feel like a legitimate game in it's own right. We really want these games to knock your socks off when they come out- and trust me, they will.