Do you like it if additional humanoid character not based of human in Fallout game?
We know that ghouls and super mutants is a mutated human.
what about if there is mutated animals that gain intelligence (like making a faction)?
for example that we already know in different game are merman and kobold.
And since it already 200 years a scientist able to decipher their language, it could be fun having furry kobold or slimy merman as a faction friend.
Merman can have underwater base too.