I think there’s an easy way to “fix” this. Why can’t you add an option which hides the real due number somewhere in the settings or so, and just show the number of due cards of one’s daily goal which everybody can individually set. Like this, you wouldn’t need to mess around with the SRS and could still tackle the psychological obstacle of high number of due cards. For me personally, that would be totally fine, because I finally only care about the number which I’ll see at the starting screen. Again, this should be optional for all those people who really want this. But I believe this could improve long term motivation for using Skritter. Indeed, I find myself in the same spot of not having enough time to scale down the number of due cards and this definitely is not motivating at all.