Currently upfront supports Global Header and Global Footer, which is a great feature. However, I think that a general Global Region should be added. Sometimes, you want to add a call to action accross several pages that is not specificly a header or a footer.
You would have to enter it manually to each page, and if your call to action's link changes... ufff, that would be a lot of work.
If you just have a general Global Region though, it could be time saving.