So if you look at this as a Step-Up (which as EAB says, it's really not though it TECHNICALLY is), you trade the 3-5* girls for Rainbow dressbloom and skillbloom (essentially being a Rainbow dupe of your choice), which is actually a very good trade for any player that's been around a while (since to be fair, you generally got 3/4*s and MAYBE a 5* and most of those were dupes anyways), ending with the typical Step-Up $60 price tag.

Dress and Skill blooms are 100% guaranteed to unlock equip slot/level up skill, so the two together IS a Rainbow dupe of your choosing, so this is a decent deal. I still say they need some REALLY good deals to redeem themselves after repeatedly shooting off their own limbs during holiday season with the super-crap nonsense of December.