I agree, this is probably the most complete solution out there. My intentions with this project are to provide various layers of abstraction, not only for Kubernetes provisioning, but also for the most common apps and tools that are usually extending the Kubernetes capabilities and also allow some low level configuration options.
It's not the smoothest thing I've ever used, but it's all self hosted and everything can be fixed with some Terraform or SSH.
Great to see some managed Kubernetes on Hetzner!