This member has provided no bio about themself...
We have already been on that for quite some time. Two new maps should be ready for a first release soon.
We are still working on finalizing the map layouts. If we'd texture them on every release, it'd take much longer to get the maps ready. Once we feel the gameplay is right, we'll start working on art passes for each map.
There will be a lot of different ways for the Combine units to enter the game. What you said are a couple of examples.
Currently, the mod allows one player as the Overwatch (RTS view) and one to seven players as the Resistance (FPS view). It will be balanced for any number of players between those.
The messages are looping. After it has displayed them from the first tweet to the last, it starts displaying them from the first one again. Just look at the posting time to not get confused.