Hello @Marv, welcome to the community!
The current system is working as intended, since the attributes depend on several factors such as randomness, tier and faction, meaning a specific NPC’s growth might always provide interesting and unique results. You can find further information here:
https://forums.funcom.com/t/follower-leveling-system-and-follower-limit-now-with-added-faq/92642
To share any feedback please reach out through the General Discussion or Suggestion boards.