XF 1.4 RSS Feed of all new posts

This is not the answer I hope to get from a developer.
There should be an option to switch from standard-xenforo thread-based rss feed to an all new post feed.

Why is it so important for me and my coworker?! My coworker use Outlook to get imformed about new forum-posts. But since we use xenforo this coworker don't get an update of new posts. Outlook don't update the order by last_post_date and didn't mention the new post.

Is there any future-plan or mod in recource to get this to work?