1. I don't agree with him. The edo period (or a fictional version of it) is certainly a interesting background. It's a little more used than other settings but that doesn't make it bad.
2. It helps. And I want interesting charachters too. But interesting charachters don't have to be already established ones. A setting can give birth to really great charachters due to its quirks. This is especially evident in everything Avellone writes. TNO, Kreia, Dean, Elija, the think tank.
And again, I meant this thread to highlight interesting settings that rpg's can use as a background. From an economical perspective, from a thematic perspective or just general stuff. For example how *magic* works in said settings.
Again mentioning FMA and HxH here since both use a rather *interesting* system regarding it.