For comparison ...
This is what the daylilies look like in one area of one of the full sun raised beds. I do grow other plants in with them. The majority have rust on their leaves just like the seedling that were in that bed last year (which were moved to the shade beds):
This is one area of daylily seedlings in a partial shade raised bed. The leaves were trimmed recently so that I could add the knife markers easier than pushing long leaf fans out of the way. This is a BIG difference from how they looked last year.:
Any explanation why they could be looking a lot better this year? I used the same soil mix, same fertilizer, same watering scheduled, etc. as the full sun raised beds. The only difference that I can think of is the fact that they are in partial shade now instead of full sun.