The only problem I have with featured images is that the hide image button doesn’t actually hide the image for some inconceivable reason. I can’t imagine that fixing this would be very hard and it seems like a bare minimum solution to the problem of people taking their contentions to the comments of the featured image. I don’t see why people shouldn’t be able to get rid of something they don’t want to see rather than be greeted with it every time they visit the front page.
For instance, I generally find people’s OCs to be poorly designed, softly egotistic, and prone to breaking away from the pony aesthetic and tone. In such cases, I don’t make a stink about it, I just hide the image that offends my artistic sensibilities and move on. The featured image doesn’t provide this functionality, which does cause me to want to say something every time this happens.