Oh, how do I, TF2Maps.net user HolySnickerPuffs, move a KoTH map to beta? Well, that's simple, really.
First, I look at In-game TF2 maps for architectural ideas and texture references. Then, I delete half of the map, and fix roughly 30% of the geometry that I should've on the remaining portion. Shortly after, I add obscure props and textures on new, invalid geometry. Afterwards, I slap on some cubemaps and ship it, not even touching VIDE or Pakrat.
That's how a pro does it. This is quality mapping skill right here.