Direct RomFS/ExeFS dumping with nxdumptool.
Have you considered adding this dump method to the Switch section of this page? It's way easier for the average user than running hactool.
BKTR section parsing for updates (using base game data) and DLC RomFS extraction are also supported. It's just a matter of entering the RomFS menu after selecting BotW, and changing the value for the "Use update/DLC" element from "No" to an update/DLC.
A hint is also displayed there to inform the user about the fact that RomFS data isn't shared between the base game / update and any of the available DLCs.
When done, the user will end up with two subdirectories in "/switch/nxdumptool/RomFS": one for the base game + update RomFS (marked as "UPD") and another one for the DLC.
I'd add it myself, but I preferred to ask first.
DarkMatterCore (talk) 13:39, 16 November 2019 (UTC)