@vincent Not sure that building a template will work in the same way a category Collection does or at least pulling categories to link to. I just gave it a quick test run and it seems if you are creating a dynamic list (say to list categories in sidebar) then you pull from posts and display the Option it’s going to list every posts option. I’ll have to work with it more later and I can see Options being useful but at the moment I think a Categories collection will be more versatile.
Disclaimer, I only spent about 10 minutes looking at it so I could be entirely incorrect.