Hi @Darkzombie, this type of behavior is intended as the stats for each NPC are determined by the faction they belong to rather than their class, so some factions do offer better fighters than others.
This thread was added on May 04, 2020, with posts from Hugo.
Just to clarify, the perks that thralls unlock are entirely random and not influenced by faction or class, which is not the case for pets as they can get perks based on their species.
You can find some more information regarding this in the wiki:
We’re happy to receive any feedback on the current balance of the follower system in the Suggestions or General Discussion boards!