Companions will remain blissfully happy despite personality conflicts with this optional add-on installed. They will still complain and trigger the relevant dialogues, but it won't actually affect their morale.
Install over one of the 3 full install versions of VC Balance Mod 11.0 available here at ModDB: Moddb.com
VC Balance Mod Version 11.0, a saved game compatible modification for the latest release of Viking Conquest (2.050), including Bug Fixes by EvilSquid and Dark Age Village Names by Philippe at Bay
Hooded Horse (my indie game company): HoodedHorse.com
Taleworlds mod development thread: Forums.taleworlds.com
Nexus download page for additional versions: Nexusmods.com
Reddit 1.0 release thread: Reddit.com
Reddit 2.0 release thread: Reddit.com
Reddit EvilSquid bugfixes (included in 3.0) discussion thread: Reddit.com
Reddit 4.0 release thread (including explanation of traits): Reddit.com
Reddit Berserker changes for Balance Mod 4.0 discussion thread (over 100 comments, thanks everyone!): Reddit.com
Reddit 5.0 changelog thread: Reddit.com
Reddit 6.0 release thread: Reddit.com
Reddit 7.0 release thread: Reddit.com
Reddit 8.0 release thread: Reddit.com
Reddit 9.0 release thread: Reddit.com
Reddit 11.0 release thread: Reddit.com