Nostalrius Begins - Quality wow vanilla realm (1.12)

The status text for characters in the game, E.G myself where i can see the number of hit points I have, lets say 300/300 HP - doesn't work for others when i click upon them. and I see no feature to enable this directly for that, so i'm assuming its not working?

Use MobInfo2 for almost-accurate health, mana, and rage for other players/mobs.

I cannot give you an answer whether this was vanilla-like or not. My memory is blank from most things like this.

It's not a bug, it works just like this in vanilla. You have to use an addon such as MobInfo2 which calculates the values while you fight.