This is not true for everyone.
It maybe so in your case, but in mine the old challenges took much more time.
Averaging the same amount of time playing daily, the old system took three times longer for me.
Because I didn’t Admin cheat. And I still had other things I wanted to do besides “Challenges”
So even though I devoted my entire daily time allotment on some days to “Challenges”
It was still a much longer process to complete.
As I said, I don’t care if they bring back rerolls, I don’t care if they bring back almost everything about the old system, So long as we who don’t care for the challenges can still progress without them.
I would however not welcome back the “admin cheat” aspect.
Even though it has been pointed out that the Dev’s gave their blessing for this method.
To me it represents poor planning, poor writing, and poor implementation.
And promotes bad behavior.