Why worry about all that? Just let people have the choice if they want to do a grind or they want to have an easier path. Same reward. Those who want the grind can do the grind. I'd definitely go down that path because I find it fun. And then those where the current tomestone setup works can choose that path.

If the issue is staying busy, there's no need for separate paths. It's only when someone wants to exclude others from it as "less deserving" that you have a need for something like that.