Ya know what I think would be a good class or maybe a good skill for the necro.
Remember in Diablo 2 you had the skill REVIVE on the Necro?
Imagine reviving all the monsters you killed for a certain amount of time?
OR… or ! Hear me out ~
A new class where instead of summoning the dead (Skeletons/gollums)
they summon demons!
I know for the most part characters in Diablo in general have failed to do this but maybe we can get a class that actually Knows how to do it.
Imagine your character summoning little demons at first Rakanishu!! 
and they have little clubs and sticks as weapons.
As you level up you can summon bigger demons and stuff like that. Your character is strong enough to control Demons to their will!
If anybody can add to this that would be awesome ^^