I feel like most times I've seen a wipe in roulette, it's just because people don't know or don't remember the mechanics. The second attempt is almost always much better and often clears.

As mentioned above, yeah Refurbisher can cause a lot of problems, and I've seen multiple wipes in that one. It can get pretty bad. But I also agree that adding Echo is not going to be what makes or breaks it. People just need to coordinate and do the mechanics properly, it's a pass or fail. Same with that one where you can become birds to avoid the ground slam, or a gorilla to smack bombs away.

I guess I just never noticed raids don't give you echo, but trials do..?? Why is that? Guess I sort of have to agree with OP that this is at least inconsistent. Most raids now are basically just a single boss fight, same as trials.