Is there a balance Issue?

[DerAven]

Since I didn't find anything about that, I thought this is the right place for that topic.
I don't remember WotLk that well, but I don't remember spell casting NPCs to be so incredibly strong!
Just wanted to ask if this is a known issue or common for WotLk, as this seems to be kinda unbalanced (I can easily fight against 3-4 Melee Mobs, but 1 single Spellcaster is already causing a problem)
Also I'm not talking about the Defias Pillagers only, but Spell casting NPCs in general.

[angrylol]

Approach combat against casters differently and you will find it easy. Don't let them cast.

[Mercy]

Some mobs can be strong in that way. Use line of sight to your advantage against them.

[WolfCD]

Yeah, just los them or kick them. They also usually die much faster then normal mobs.