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Sony needs to fix that software issue on the XZ
Until Sony Japan HQ fires those incompetent software developers from Sony Mobile of Lund, Sweden, the same problem will continue to happen. Same problem in 2017. In 2018. Assuming Sony is still selling phones by then.
Even for other Sony mobile apps, they're buggy, bloated and bug fixes are slow to be released. I bet someone from India or China could do a far better job at a fraction of the price used to hire those Swedes.
The hardware is good, it's obvously the software (postprocessing) which is the problem. Also, proper OIS does help, especially in a low-light environment, not proprietary crap digital stabilization (Steadyshot).
Maybe Sony Japan HQ does not care: it makes plenty of money from games and movies etc. Or maybe Sony Japan HQ deliberately doesn't want Xperia phones to steal businesses away from Sony's DSLR cameras.
And you wonder why Xperia phones hasn't got a bigger market share.
" I bet someone from India or China could do a far better job" - hahahaha! You've made my day 
If I will see the bad soft produced in china and india which is always the case for sure I will run away from Sony brand. Sony's UI and soft is recognized as one of the best in Android world just because IT IS NOT made in india. I agree that some improvements still need to be implemented by already experienced team in Sweden.
Moving the soft to china / india is not only the risk, it is DISASTER.
the camera software is a desaster. Sony needs to fix that in an update, doesnt matter its from sweden or india, fact is that the cam software needs to be updated.
I was wondering what difference would be there in the Camera between XZ and X Performance. I was going through dxomark website and saw the X performance Camera review and it got just about perfect score. Here is the link:
https://www.dxomark.com/Mobiles/Sony-Xperia-X-Performance-Mobile-review-Impressive-results
Anyone from Sony Support or the users for that matter, confirm whether there are any major differences between the two phones?
Xperia X
Xperia XZ
In my opinion, XZ smashes the X camera which was on par with Z5 imo.