I'm pretty sure their intention is to make loot harder to get outside of raids and possibly m+.
Unless your doing mythic raiding it is inefficient to gear up doing raids. People do it because mythic+ sucks for them. They will not be nerfing raid gear at all unless they decide to load each boss with far too much loot. It would be a nightmare if they decide that each boss has a possibility to drop 5 items. You know that most of it will be trash.
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No, the issue is the way loot is spread. Weapons and trinkets being early in the raid means that geared assholes are only there for that early boss. Why invite that guy 10 ilvls higher than the raid loot when you know he will leave right after the first or second boss? If people were smart they would only invite people who actually needed the gear or are of like mind. People are not smart.