I found the final fight chaotic, hard to understand, and run. (Plus the map doesn't have starting positions on the graphic, which confused me.) I ran multiple times at Gen Con.
Bottom line, this fight is hard and a good challenge. For experienced players, it could be very satisfying.
The problem is, it's too hard for new players. It's also hard in a not fun way: it's hard to move.
SPOILERSYou basically have to cross the map over difficult terrain running against the clock to save scientists without knowing exactly how to save them (by attacking each of the two bad guys separately, not using focus fire, while you ignore the boss taking pot shots at you.) If you aren't running pregens and have 0-1 casters, it is that much harder to move.
Included are clarifications on how to run and possible alternate starting layouts to make it a little easier and therefore more accessible, fun, and engaging.