But most of the dungeons you mention that you liked minus Snowcloak, OP, were optional dungeons. The recent ones you list that you don't like are MSQ.

I think the problem is that SE saw people weren't doing the optional dungeons so they tried to make them more appealing. Almost every time I get Aurum Vale in queue these days it's a Join in Progress because people bailed right at the beginning. SE should have just said "These are optional. They're going to be more challenging and we're not going to change that" like they stuck to their guns about Ultimate, but unfortunately they didn't.