I personally like my pastels with a bright clean yellow for the main priority.
I dont care if there is blushing or not. If there is little blushing it makes a good contrast, if there is high blushing it still looks good, and will make really cool super pastels.

I guess that comes into play when your mixing morphs too. Do you want a good yellow? I dont know if blushing does anything for a lemon blast? - Id be more concerned about the yellow.