I addressed the first point in my post, but I don't think the second is an issue.
Odd mechanics are things which keep things fresh, and the ones in steps of faith really made you feel like the Dragonsong War was something we'd struggle to fix alone. If they made it so that you'd automatically fail if you didn't do enough of the special mechanics by certain checkpoints, there'd have been a lot less whining.
Geez, I never realized how bad it was. As long as you got the dragonkillers, the HP didn't really matter anyways, so I didn't realize that it was just a target dummy shaped Avatar.
Though as long as I had two others who knew what they were doing, it was easy to carry the rest of the party in that trial.