Just because the Cascio tracks are so different from most of Michael's recordings (the last ones you've heard are from 2001) and have additional effects on the voice, doesn't mean MJ would not be singing them.
There's no mistake, the recordings are sung by Michael Jackson. Accept it.
If you deny to accept this, you're also not accepting forensic experts and their whole field of science. You cannot ignore science and you cannot claim that these experts would be dumb or "paid-off", otherwise you're again believing some sort of conspiracy.
Your ears can tell you it sounds different, YES. But do they also tell you why? Hmm? NO!
Now your brain starts to search for possible reasons and then it will first remember all the bad things in recent years (there are quite a lot) and it will maybe come up with some bad theories like "This could be the Jason guy" or "Sony is killing MJ's legacy, they planned all this".
C'mon, guys. Sony is not interested in losing sales interest in MJ products. The mediocre choice to include these new and roughly recorded songs is the result of John McClain and John Branca, the head executers of the MJ Estate. They do not care about Michael's huge fanbase, they never did. They are seeking for money, money, money.
The general public has currently a huge interest to buy "Michael" and the new tracks have contributed much to this fact (due to their internet presence which attracted many non-fans).
Look at "Vision": What does it say on the back?
Executive Producers: John McClain and John Branca.
Well, false friends of MJ...
So, if you want to complain about anything, unite your voices against these two persons, they are responsible for the whole situation.