To be fair, the animals listed are only suggestions - not a 'list'; nothing is 'missing' in that sense, there's just a few creature types they suggest to give you an idea.
Fun fact: the ard- etymology is also the same root source that gives From soft their Erdtree ^.^
I don't think the 'ling' suffix is deliberate for approachable connotations; within the realms space there's just as many, if not more, creatures that use the suffix that are not nice at all, and tieflings were originally amongst them - not intended as playables at all in their first iteration. ^.^ It does, however, feel a bit lazy to me. I'd have rather they had a non-derivative name of their own.
