I had this problem a few times in the past already, but I never felt it as strong as now: The pacing of new content is very strange.
Lets take 8.3 for example (it really is not only about that patch, but its a good example:
- Week 1: We get world events (invasions) and quest that show how big of a deal the new boss is (this is fine).
- Week 2: New raid opens on normal+heroic. Nzoth gets killed day 1 by me on normal and some days later on heroic too
- Week 3: Mythic Raiding opens and M+ with new affixes starts
So here is the thing: After week 2 the content makes no sense anymore. I killed Nzoth, the threat is over. His growing influence in m+ makes no sense anymore as well as the invasions.
IMO it should take way longer before the raid opens. I understand that many people (including me) want to play the new raid, but the current system completely devalues the m+ and open world aspects.