They did nerf the fame in T7/T8 dungeons with Queen (also perplexing) which also caused a nerf to the silver. I wonder if this is what also caused the initial feeling of less loot. But regardless back to the point if they just revert dungeons back to how they were set pre Queen that would fix the issue instead of this weird weekly tinkering game.
So some of the loot being crappy was some things, and some was other things, but its hard to tell what did what because so many things happened at once.
..QQ _^..^_/ QQ..(not to be eaten!)