Something to add to the mix, I think that often people miss a critical step before modifying a page layout. To me, you have to start with a list of priorities, without making assumptions. If there is anything that seems like the "Well of course they need this" content, confirm that with the intended users. Priorities are likely different between desktop and mobile, which means you might need separate lists. The key is to have a defined "truth" that acts as the foundation for any page layouts.