Ketch - new open source tool by shipa trying to provide a solution for deploying apps directly onto the cluster without writing any Yaml. I have written a blog that gives a overview of what it is and how it can be used. What are your thoughts?

How would I tune (set) resource req & lim settings?

How do security settings get set, like PSP and service mesh allow/deny?

AFAIK there is a ketch.yaml that can be defined for customisation. This is a pre alpha version so there will lot of things coming up in future like editing the fields that you mentioned and deploy. Some level exists via the ketch.yaml.

Here is a live discussion(recording) on it https://youtu.be/39O9s1JpSxg