Just because another universe portrays something narratively different in their story, it doesn't mean it fits into current D&D mechanics. Those were-hyenas are not D&D 5E were-hyenas. They are either lower CR creatures with much fewer HP, or if we want to make a 4E comparison, they are merely minions. That doesn't mean Conan or D&D warriors need to deal 50 damage with every pommel hit or unarmed strike.
If 5E created a minion category, would that actually make martial characters feel better? I'm not sure they would. Because magic AoEs will still be more effective against larger groups of minions. Not without the martials getting more of their own AoE "powers".
I could be wrong.
I don't want, or need, minions in my 5E game. If I want to set up a scenario where a higher level lone fighter is fighting off a pack of enemies, it's easy to do. They won't be were-hyenas, there are plenty of other options.