I don't think the 'grind' is particularly bad this time around, really. I've been dipping into Zadnor for half an hour to an hour each evening, it's been less than a week since it went live and...I'm already max rank with the raid completed.

Even after going into the raid blind and dying a lot to the last two bosses the mettle gain easily offsets any losses upon successful completion.

That's not to say I would be opposed to a challenge log...I just don't think it's a necessity. Especially for content that's meant to last for the next six months.