Soap, you should play (and/or finish) the first two games, just so you can see what was originally the formula for the game-world. Beth seems to have misunderstood/deliberately changed a lot of things.
Beth probably saw the variation in locations, like Mariposa, The Glow, Necropolis, and thought "awesome!" then saw booooring locations like Modoc and thought "haha, lol, noobs, they forgot the radioactive pools! How is this town ANY kind of post-apocalyptic!?"
It's not for no reason that a lot of people - independently of each others - have refered to FO3 as a kind of "Fallout themepark", rather than a believable Fallout game world
Just imagine... close your eyes and imagine for a moment - exploring the "Capital Wasteland", and coming across a huge area like the "NCR Sharecroppers", you run through and past, and then you come across trading centres the size of the Crimson Caravan HQ and outskirt slums the size of Westside.
It would make so much more sense... than stupid Megaton wouldn't it? But.. for those who only ever played 3, and only ever knew Megaton, I kind of get it - it's a cool location, its very rusty, it has all those "balconies" circling the area, it's niftily designed, and the front gate, it actually moves!
Rivet City is indeed an impressive place, a huge aircraft carrier, transformed into a city.
But like so much else Beth did - it's not... Fallout... it's cool and rusty and nicely designed and fun and cool and all that stuff, did I mention fun and cool? But it fails to compare to the towns shown in the 1st and 2nd game - or NV. These games have "boring" "uncool" locations, look at Goodsprings! What a yawn-fest!
But - and don't tell Beth, it will blow their minds right to the hospital, but - - - deliberately making a place a bit boring, is a design choice, it makes Goodsprings feel safe, charming, homely, like a believable little cowboy town!
Beth all "B-but... DEATHCLAWS!!!! :O" shhhhh, no Beth, no... maize.
"DEATHCLAWS!?"
no. Maize.