>So when I sell these guys to customers (or see them called Luecistics are shows) I should basically mention that they are patternless and that they will lose the splotches, correct?
Yes and yes 
>Oh boy . . I almost bought a "Luescitic" (patternless) Juvie at the Northeast Pet Expo this weekend . . . gorgeous looking guys they were . . .
They are my favorite morph.
>So what color WILL the patternless be?? How much different from Blizzards' colors??
Patternless adults have a solid yellow body with a yellow or whitish head, and a whitish tail. Some have a little bit of a carrot tail too. The intensity of the yellow varies from gecko to gecko. The little guy in your pic looks nice and yellow, but only time will tell for sure. I'm less sure of the range of blizzard colors, but generally patternless have much more yellow than blizzards.