My theory on why there hasn't been movement on the Burns fight is because they need to have it in Abu Dhabi so Khamzat can "make" weight, and thus, they're trying to figure out the logistics.
If he makes WW in the West, I'll gladly eat crow, but here are the facts.
1. He's only fought at MW in the U.S. and Sweden. All of his WW fights are in the Middle East.
2. He's bigger than most MWs.
3. He looks exactly the same at both WW and MW. The only difference is that he dwarfs his opponents at 170.
4. At his last weigh in, he held the towel and the scale fluctuated five pounds.
If I'm Ali, there's no chance in hell I'm letting Usman, Burns, Luque, or Muhammad fight him in the Middle East for all the reasons I listed.
Also, idk why the UFC doesn't just have him fight at MW. He can be just as big a star, is good enough to contend, and that division is desperate for fresh blood. Meanwhile, there's a logjam at the top of WW when it comes to the title picture. Maybe they want him and Izzy to each have their own things going, and thus, having them end up competing against each other in all likelihood would be counterproductive.