Smooth upgrading from 16.2 on 17.1

Hey ! I would like to know if I should pay attention to something about templated policies, from 1.16.2 to 1.17.1
I create my own policies, roles and token via ui and the new feature requires curl calls which I don’t need in my simple cases ? Should I do something before it ? There is mention at change log and documentation about API calls but most of them are GET method and just one is POST, which it indicates, I can’t create my own etc… ? So is it something what should I worry about that ? When I need to upgrade smoothly without any outages ?