Who cares about 5mans? The reduction there is nice at worst why would you complain? Did you want to spend no shards at all for 5 mans?

Did you consider it might not have been intended to be a "big deal" for 5 man parties where the soul shard cost was never great? It's main focus is obviously and rather gratefully for raid summoning and similar, that is after all where most Warlocks end up spending most of their shards as it is.(With exceptions ofcourse) It'll be really useful for me atleast.

Personally though shards have never bothered me, I'd welcome a change to the system if it's fun and interesting but as it is i keep my bags organised and losing a single bag slot to shards where on other characters i might lose it to different suits of gear, ammunition, reagents, etc is not something i've ever been unable to work around tbh.

I disagree that most locks hate the soulshard system, i think most locks know what they're getting into when they choose to get into it. Change is nice if it's fun and interesting but for the sake of bag space?