Okay, I'm going to be brief. This map makes me angry. It's not only annoying, it's unfinished. A lot of the background is plain as day, you can see where the map just ends in multiple areas, the layout is confusing and the way forwards isn't always clear, nothing is explained, the zombie soldiers with their guns that can kill you in only a few shots and have to be fought to get the power on can fuck right off and I fell through the map in the first zone (to the left of the railway building doors). I'd certainly like to try a lot of the features touted in the description, but frankly I don't have the patience and the two main ways I found to go ended in dead-ends anyway. So...yeah. Not a fan.
Agreed, it's such as shame to see all of the content in the trailer and clear talent overcast by and hidden behind a wall of non-enjoyable, non-challenging but fiddly tasks.