Disabling a DLC will remove all features of a DLC; maps from your hosting options and DLC items. For a short time there was a bug where disabling a DLC didn't impact the game, which was fixed in patch 4.2.
Hotfix 4.2.1 just went live:
- Fixed the ‘drumming’ sound heard whilst “Impenetrable” is active on Ironbreaker whilst venting overcharge/THP decays.
- Fixed Grail Knight not receiving THP when killing an enemy with Blessed Blade.
- Fixed an issue where Hagbane could doubleshoot, causing unecessary ammo use.