A lot of people are voicing their disappointment in the lack of compatibility for some of these kits. I was personally very surprised that split backspace/HHKB wasn't supported as well like in the previous rounds, and had even asked the vendor to add it in.
I'm not sure what the specific reason was to have this drop as single style options, as oppose to many kits (like previous rounds). They are also trying new designs despite the popularity of old APL, Tulip, etc styles. Perhaps the feedback will help future Hammer caps, as they did tell me that they are working to scale up their production and order more molds.
Edit: Will be posting comparison pictures with Tulip later today.