haven't read the piece but Ibaka is multi cat stud for fantasy purposes and will only get better. His shot is improving as are his playmaking skills. He had a much higher player rating number on ESPN than a lot of other "big name" players had like Bosh, Tyreke Evans, etc.
In multi cat leagues he's a top 20 player to own.
On another note, the writing on Grantland is great but I just don't have the time at work to read articles of that length unfortunately .