Once again, I'm speaking strictly in terms of the United States. Your description box says that you live in Sweden, and I'm sure Michael has a significant standing there. But in America? He's old hat.
XSCAPE did not sell platinum in the United States; it barely pushed by Gold (500k copies). The only song I've heard off of that album on the radio was Love Never Felt So Good. If XSCAPE was really trending on Twitter, it was because so many people were complaining that the Estate was making money off of a dead man (I searched #MJXSCAPE a few times, and the number of outraged/confused people largely outnumbered the excited fans). I've never heard LNFSG requested; radio stations around here played it simply because it was popular. TV hosts spoke of XSCAPE whenever L.A. Reid/Timbaland were there to discuss it; I haven't seen a flat-out discussion on the album at all. Once again, I'm saying that generally, people in the UNITED STATES don't seem to care much.
Also, This Is It was indeed record-breaking. But tell me, where did these concerts take place? EUROPE.
Once again, you (like Onir) are speaking on behalf of the entire world. You can't assume that the single failed because people thought it ruined the original. Once again, I know of a number of people who prefer the newer mix, myself included. It failed because people really aren't interested in Michael Jackson. Once again, he could jump in popularity in ten, twelve years. But for now, he's overdone.
Also, what was the promotion for Love Never Felt So Good? One performance? One music video? A Jeep commercial that I've seen twice? I've seen the commercial with A Place With No Name more often than I have for LNFSG. If anything, APWNN got just a smidge more coverage than LNFSG; the only truly opposing factor is the fact that it wasn't handed out to radio outlets properly.
Allow me to reinstate my argument, just so people begin understanding where I'm coming from: I am not suggesting that people don't like Michael Jackson all around the world. I am stating the simple fact that interest in him has died down significantly IN THE UNITED STATES since his death.
Vintage Michael is the only thing the general public is willing to listen to. All I ever hear on the radio is Billie Jean or Thriller or The Way You Make Me Feel; anything else might as well not have even been made.