Fallout 3 is a game that desperately needs a remake, instead of a remaster.
The biggest issue with Fallout 3, for me, is that instead of being a big book with a lot of good chapters.. its more like a compilation of unconnected short stories.
Almost nothing you do anywhere, affects anything else in any signifncant way. Theres no feeling of the world being connected across its locations, everything feels isolated and contained, like traveling from snowglobe to snow globe.. The Karma system and being hunted by regulators/Talon for being too bad/good just feel like slapdash attempts to make consequences...consequential.
But the world spaces could definitely also use a heavy makeover and improvement as well, like the DC metro area. But not only the DC metro area. the whole world space of fallout 3 feels like the bombs fell 30 years ago, not almost 200 years after the bombs fell.