This is a very different situation. I understand the bump on the iPhones. Those cameras are used almost on a daily basis, whereas I can't remember the last time I tried to take a photo with my iPad. The bump is not necessary. I would rather have a crappier back camera with no bump. Can't believe i'm the minority here
The iPad Pro camera bump is necessary because there is no bezel to hide the camera/lens components in. The camera module is basically bolted onto the back of the LED backlight. So you appear to realize that a quality camera system needs some depth.. and there's literally nowhere else to stick that hardware. Your preference is "crappier camera", but Apple made a different choice. For all we know, it might have needed to go back to "first gen iPhone" quality, in order to make it fit with no bump. And doing that would have the inter webs in much more fury than a bump.