I liked ARR log.

Some were hard but the riddles were more rewarding/interesting than just "find the giant glowy orb with fight".
The few bits of climbing in Kugane and Radz-at-han were interesting (and aggravating for the first).

A middle ground would have been nice with less time/weather restrictions, but keeping the riddle instead of the orb.

They also didn't even make a "second part" in ShB i think.