Thought I would add some info about upgrade progress. I'm working now on first half of map 3 on snow level. Map 1 and 2 are not fully finished yet, but I will return to them later when I'm done making final map.

I read comments from workshop and gamemaps(pm's too) and this is so far what will be changed in upgrade version based on feedback:
- passcard event will be changed to grab it along the way, which also be important item to use later in campaign
- worlds will be bigger in scale and without long backtracking like on map 1, so there wont be fake stretching of the maps
- better hints system will be added since it still may not always be clear where to go or what to do next in some places
- navigation mesh will be improved so bots will be more useful and there wont be issues where infected spawn next to the player
- current low volume voice audio from radios will be replaced with other and louder voice over lines so players will actually hear them
- stargate teleportation will be without waiting for players sign like in map 3

Also there will be some significant changes in upgraded version. Hub area, place where survivors return, in current version is Stargate Control Center. It will be replaced with spaceship which gives option to travel to planets without using Stargate or be used as rescue vehicle.
Maps will be bigger with more reasonable paths. So it wont be like in current version where you walk from lava temple to metro station. This means that some parts of the maps will be moved to other map for example room under pyramid may be somewhere in map 3. Also current places will be extended for example compound in map 3 now have more rooms.