It's simple at this moment after everything and after BFA Launch and SL alpha-beta-launch (when blizzard start doing very well and them stopped answering feedback and fixing problems to work on only gods knew what )
And how blizzard reputation and trust is right now, people think that even with high amount of time and feedback blizzard can do shit in the end, so it will probably be worst with less time and feedback
If it was before BFA, after legion or wotlk people will probably think differently
Maybe they were working and hiding things like last 3 boss from last raid ? Can but hard to believe
Tbh Wow community is really toxic (like almost everything in internet or make with people ) but we also have a lot of people who work very well for free, look at class discord they can make thousands of simulators, try to fix bugs etc
If the right people get a chance I think it will be better with feedbacks than without it ... So in the end it's not just about time and more about players trustworthy in Blizzard
Sorry my bad English