Why not? Performance issues?
The funny thing is that since Squad came out, AAPG has even less players......I am hoping the AA devs will see that, finally wake up and redo AA the way it was before AAPG. Heck even AA3 would be better than AAPG......
Augustine, have you played aapg since the beginning in 2013? It was a quite different game, many things were done in a much more proper way despite the game lacking part of the content it has now. And I think many would happily agree to have less content but more polished rather than a few more maps or a few more features that aren't fully tested throughout (map wise it was the case of Intercept, which had plenty of spots where you can nearly get stuck into, or feature wise with the way securing now works...you can basically drag an incapacitated player, just by spamming the key and moving back).
And since you mentioned AA3, Airfield was another bad example of "more content no matter what" especially after they introduced AI, which was terrible.