Julia it looks like you might need to put slug bait out. The blemishes on the sedum leaves look like slug damage. They make the same type of blemish on the sempervivum. I have been finding slugs in the semp and sedum beds this last week.
Nice collection of tall sedum.
How old is your Blue Pearl plant? Mine took 2 years to establish a strong root system. It is doing great this year, even in a mostly sun location. I think it also really loves the sandy loam composted soil in the bed. I am finding that I have to water more this year with all the high temps and no rain. I leave the sprinkler for about an hour, sometimes more, to water really deep, driving the roots deeper to seek water. I let the bed dry for a week or more, depending on how the soil looks.
I am going to try using this sandy loam as a potting soil to see how the plants do. Maybe re-pot Pinky?
Did you find Touchdown Teak?