Oh it will be improved but you're gonna have to wait until iPhone 7 for that. How do you think apple makes so much money it's definitely not by giving you everything in one package. But instead gimp some stuff here and there and offer the very thing that should've been there in the first place in the following years.
If apple touted their camera at 8MP is worlds best in class and there's just no need to cram more pixels in a tiny sensor (based on their past keynotes) then why up it to 12MP? These guys are world class salesmen. It's a business after all and you won't buy another iPhone if it had everything you wanted right now.
You wait and watch when the iPhone 7 comes out they will probably keep the same 1080p screen. Same 16GB size. It's not until maybe the iPhone 7S or even iPhone 8 they will update the screen resolution and give you 32GB as base size (which I highly doubt since 16GB base makes them a huge margin in profits.)
The most pathetic thing is even with such a great camera, you are not allowed control ISO, shutter speeds, and even image size. You just don't have options with an iPhone