I've noticed a severe drop-off in feedback since story Comments and the portal inbox were turned on. I certainly understand why both were enabled and have no problem with their implementation. However, where I used to get 15-20 emails, now I get 1-2, maybe 4 for a new story.
It might be that I'm writing shorter one-off stories instead of multi-chapter epics, or maybe that I'm just not capturing the interest of as many readers. I guess we'll see going forward.