There is some good stuff in this sitrep if you are looking for details on the upcoming Apex expansion. It looks like they are trying to get weapon switching (on the run I believe) included with the 1.58 build but everything else is staging for Apex.

https://dev.arma3.com/post/sitrep-00151

They also commented that Apex is being prepped for beta testing which hopefully means they are one track for releasing it within the next 30-45 days.

..and did I mention Apex will introduce Jeeps.