I have noticed the same, on seedlings as well as registered plants that are blooming for the first time in my garden. First time seedlings really seem to need a few tries and even older plants seem to be throwing less exciting flowers.
Here are two in my garden that are showing a wider range of expression. Multiple photos are taken over a few days as they burn through the buds on each scape.
This one has lovely patterns but the cloudy weather seems to make it lose pattern.
https://garden.org/lists/item/...
This one I mixed up the photos. The first bloom is near the middle and has two tiny white splotches which I thought was awesome until I saw the second bloom (those top photos with more patterning) and then the third bloom was pretty bland with only faint hints that may not even show in photos
https://garden.org/lists/item/...
