I see this being a big usability issue... I have message previews turned OFF. So when I get an iMessage, it just shows the person's name, and iMessage. If I pull down to actually just LOOK at the message, iOS 8 (B2) marks that iMessage as "read" and removes it from Notification Center, AND takes the badge off of the Messages app. That's VERY frustrating for people who maybe cannot reply to the message right away but want to actually see what the iMessage says. Same goes for "long" messages even if message preview is ON. If you get a longer message than the banner notification will allow, and you pull down to just LOOK AT the full message, but maybe you can't reply right away, that message is marked as read and the badge is removed. Shouldn't the Message and the badge "persist" until some other action is taken?