Ya i agree it didn't really make any sense, it was very repetitive and didnt really include anything good. It also looks nothing like fallout and yes i do get that they were in a canyon shielded from nuclear blasts.
I liked it and thought it was worth the $10 worth of MS points. The loot at the end is some cool stuff too. As for the plot, yeah maybe a little bit shallow in that area. I didnt like all the damned preaching Danial and Joshua liked to do.