That was just 5 dungeons out of one xpac. Also I spammed dungeons and only got one trinket I wanted in two weeks. If you got them all, then I consider you lucky.
But to your point, I’m not suggesting it’s the only thing. They should sprinkle in their 2-3 raid tiers and a new map. I’m suggesting they put a major focus though on repurposing old content so we don’t have major content droughts like we have now in between tiers.