First of all, congratullations for this wonderful mod!
Would you please provide mod settings for ignoring a user-given comma-separated list of fluid IDs which should be ignored by the mod? In this way people could exclude the liquids they don't want to get barreled, like lava, etc.
I think this could work especially well, even for modded games, by detecting everything which is a fluid and then providing the barreling recipes for each one which is not in the ignore-list.
And maybe an optional feature to disable any other recipe of other mods which uses barrel and fluids running on normal assembly machines, replacing them with the new fresh ones provided in this mod.