For the June Trading Post (and retroactively looking also the Noblegarden Ensemble) there is a cost disparity between the full set together vs the set broken in to pieces.
Using the swimwear set pieces for the same of same amount of mog pieces:
Ensemble: Sunny Tropical Swimwear - 650 Traders Tender
“Ensemble”: Tropical Sunrise Swimwear - 710 Traders Tenders
Tropical Sunrise Sunshade - 220 Tenders
Tropical Sunrise Halter Top - 200 Tenders
Tropical Sunrise Skirt - 150 Tenders
Tropical Sunrise Sash - 60 Tenders
Tropical Sunrise Beads - 40 Tenders
Tropical Sunrise Airy Sandals - 40 Tenders
I believe the Beachwear come out similar in cost due to the floatie cost. I believe Ensembles for BOTH color sets should be available alongside the broken down pieces.
But to my main point the cost for pieces for what seems to be the more popular color scheme being overall more expensive seems like pointless inflation. Allow purchase of the parts for SAME COST OVERALL and subtract cost of those bought from Ensemble if someone wishes to complete it in future.