I noticed this a few weeks ago - I updated some screenshots in my sticker packs to reflect the new additions and the screenshots never showed up in the App Store, even though I could see them in iTunes Connect. After yesterday's all-day pre-scheduled iTunes Connect outage, they are now saying there's not much you can do w/ app updates. Seriously - WHAT THE HECK. For marketing alone, this is insane. How can you show updates, facelifts, etc.?