So the issue then becomes they made the requirement to get to a raid an issue for casual players. I think the raids are fun and all but going by those trophy stats, it seems that while the raids may be the best content for the game, the majority of players are not seeing them. It then makes sense to why they would cut a new raid and instead opt to add more things that are accessible without the requirements for a raid. Sucks for those who have been waiting for a new raid though.
The issue is that people don't finish any games they buy. Look at any other game on your trophy list and I can almost guarantee that the majority of players didn't even make it past the halfway mark. By making raids an endgame activity, you've already guaranteed that most players aren't going to see them at all. 80% of players have never raided, but most of them aren't even still playing the game anyhow.