I think the size of the X is fine for most people but obviously some people would prefer a larger screen and form factor and others would prefer smaller (myself included). I would love it if they would make a phone with the same screen dimensions as the 8 but without bezels. Get rid of the SE, the 6S, the 7, and the 8. We already know they're not moving forward with Touch ID in the future so why not streamline the product line into 3 phones that share the same general functionality and look in 3 different form factors? You could make the smaller phone more budget friendly by say, only using one camera in the back and/or using an LCD screen.