I am sure they would, and the issue is probably more to do with who is on art for which story. Pichelli is the primary artist on this book and would probably expect to draw the important scenes with the F4. Indeed Marvel would probably insist upon it. So the backup is necessarily not about adding to the main narrative.
In a perfect world Marvel wouldn’t have tried to maximise their money with a backup story and extra pages, but we live in a world where that extra money can’t be ignored and so we end up as fans paying for a story that could have been told in interstitial scenes over a few weeks in a normal length, normal price book.