but because of Dricus Du Plessis 11 takedowns he has more output than Strickland,
From what I know, takedowns shouldn't be counted for round scoring unless there's some follow, such as ground and pound or submission attempt. But it's clear that judges are considering them as well.
Some say that the fact that DDP took Strickland down so many times, but couldn't keep him on the ground for longer than 2 minutes combined and couldn't do any damage, should actually be counted against DDP.
Jamahal Hill vacated the belt when he was injured while Jiri Prochazka Vacted the belt as well, so why didn't Jon Jones
Because UFC puts the money first and the sport element second. What they did makes no sense, if they decided to introduce an interim heavyweight belt, than Jon Jones should be fighting Aspinall after the recovery. If they still want Jones to fight Stipe, then what's the point of the interim belt then. And what happens if Stipe wins? Will he become the undisputed champion?