Not going to argue too much, just saying in Diablo games specifically, the “summoner” aspect of the necromancer isn’t the end all be all of the class. In the Diablo Universe their also spell casters that do other things to great effect. As far back as Diablo 2, there’s been bone centric builds and corpse explosion centric builds that used a golem or no minions at all.
In Diablo 3 they introduced blood magic to their tool kit and corpse skills like Corpse Lance.
Any way, what I’m saying, is asking for the “summoner” aspect of Necromancer to be buffed is fine, but arguing the the “summoner” aspect of the Necromancer is “Core to the class and thus should be powerful because reasons…” isn’t true.
In the Diablo Universe, the summoner is a build a choice, just bone, shadow, or corpse use, or blood magic. And builds in Diablo have always required gear to make them work.
If you didn’t have + Raise Dead gear in Diablo 2 to increase the damage and number of undead, you were playing a weak summoner. In Diablo 3, they created a set that caused your Skeletons to attack mobs whether you “activated” them or not (meaning you could activate them once and they’d go pretty much through 2 to 3 packs without you activating them again.)
In other words, in the Diablo Universe, Necromancer summoner builds were always gear dependant, just like the other builds available to Necromancer.
Any way, just saying your idea of Necromancer should be a powerful summoner independent of gear just doesn’t hold true in the Diablo Universe.