-allows for easy access to any mutation without having to wait weeks for it to become available.
-numerous glitches, such as custom soundpacks not working in some mutations and the game just flat out freezing.
Overall, this is an awesome mod, but it does still need some work done.
+Feels like an actual L4D map
-None that I can think of
I cannot really think of anything wrong with this map. Maybe, like others have said, add a title card at the beginning of the campaign.