I just want to quickly clarify that you’re making some assumptions here about what we said. Just because we said option “A” won’t exist, doesn’t mean we’ve confirmed option “B” will exist. Nor does not confirming option “B” will exist, mean it won’t exist, but you seem to believe we’ve said/confirmed something to be which we haven’t.
I’m not sure which skill you’re referring to here. If you’re referring to Summon Wraiths, it was dominating almost all other playstyles by being able to spawn over a hundred wraiths which did crazy damage and distracted all enemies. One the main reasons this was changed however was for multiplayer performance, as having four necromancers each having over 100 wraiths was not something which was realistically feasible. The net result was an overall “nerf” to their potential power - yes, because it was far out of line. However it wasn’t just a straight nerf, we attempted to redesign their power to a better path that would work with performance considerations. They were given some compensating buffs to try to ensure they stayed a relevant ability. Again, balancing is something we constantly consider, and we most certainly take feedback, such as yours that something may not be where it should be. However if you could provide more specific information it could certainly help us narrow things down.
We had a dedicated blog post here (Necromancer Updates coming in Patch 0.8.3) prior to the change to discuss what changes we were making, and what our intents with the changes were.