Yeah, I think my thinking was that I usually go for web-dl+, but in some cases a show isn't release in that quality and then I go for the best that's out there.
Until now I used the series plugin and could set the quality on a show by show basis. Using myepisodes_list this isn't possible as far as I know? So I have another task using the series configuration for those shows. As a convenience it would be nice to be notified when a show I'm interested in shows up in a sub par quality and is ignored for that reason by the myepisodes_list task. Then I would know I had to check out what was released and maybe add it to the other task.
Anyway, not the most important feature, I can just as well check my myepisodes list and if a show isn't marked as downloaded I can use that as a notification and do a manual search.