Hello, 
I am creating websites for clients, and some of them want to create a blog or rss feed. 

There should be a way for the clients to create or update blog/rss content (for a blog/rss created using WebSite X5) without having the need to have the project files and the software.

If using the option that i mention above there are some risks that the layout / content of website would become compromised (has happened sometimes) and the back and forward of the project files between both of us.