Even if this didn't happen, the odds were always against him being de-aged. But now it's going to be almost impossible because making him a kid means they can't capitalize on his new romantic options (though I think showing that even children can be LGBT would be a much more powerful story. The media tends to forget the people who say that they've known since they were kids)
I'mma still keep demanding it. And this definitely isn't enough for me to say the age-up was a good idea. But, realistically, it ain't looking too good for the real Jon. The bland, New 52 Clark clone is probably here to stay