[TokuJay]

It's worth keeping in mind, as well, that there were nowhere near the amount of other SHF lines back during the W, OOO and Fourze days. No MCU, Star Wars, barely any Dragon Ball characters not named Goku, Vegeta or Piccolo; it was leaner times so Kamen Rider got more slots.

There's nothing stopping them from putting out final forms other than just... deciding not to put them out. They've been sat on Mugen and Genius for a LONG time now, for example; if they wanted them out by now, they'd be out. Bandai are a weird company, but presumably there's some method to the madness here, and I don't think getting things like Metal Cluster or Dragonic Knight are the issue.