I haven't culled yet, but here are a few whose chances aren't looking good:
Ice Capades - looks pretty in the catalog, but this spring it only has one increase after four years of growth. Other cultivars next to it are doing fine.
Strut Your Stuff - this one is struggling, too. It does have one bloom stalk, but from a well-tended fourth year bloom I expect more.
June Krausse - not a strong bloomer, I don't really like pink selfs, and I need the room for my new orders