I'm another person who feels like the MSFs are the least interesting thing to get from this collection. SR is not bad, but it is metallic and honestly, I think the big deal about it when it first came out was that at the time, there were so few bright cheek colors out there; so it seemed really unique. There are newer products out there nicer than PP, too.
Personally, I'd rather only get brand new MSFs, since the newer formulas are much nicer for the most part, smoother and more subtle. The Heavenly Creatures and Semi-Precious ones were spectacular compared to these older ones.
You're better off spending the money on the blushes or more MES, if you want Mineralize things, or just saving it and wait for all the upcoming collections.