The swordsman and archer of higher elves and blood elves have the same models (color of eyes and armor), although the priest, sorceress and dragon hawk are different.
You should mention what graphic mode you are playing with when reporting model issues. This is not a bug if you are playing with classic (SD) graphics as that mode never had such models due to requirements of when it was made.
It’s about reforged mode. Although I think it’s understandable.