Still a couple problems about the new version
-You need to fix the teleporter system. Put all Flood respawn points within the radius of the sender node. That way, when the Flood respawn, they are immediately teleported to the map. The way you have it set up, people have to walk to the sender node to get in the map. With teleporter lag, this system can get very frustrating. You also have WAY too many sender nodes. You need only one sender node and it should lead to multiple receiver nodes with the same channel.
-I like the addition of the second floor. But it would be nice if you gave the humans some motivation to go downstairs. I suggest adding more weapons down there to tempt humans to leave the second floor. It would also make for a good risk vs reward mechanic.