I am not sold on Makachev's future at 170lbs. Islam never seemed like a big LW to me, and there are some pretty big WW's. Can't take anything away from his skills as a well-rounded fighter, but the guys at 170lbs hit harder. The uncertainties are Makachev's chin, his cardio, his strength, and the ability to gut it out against guys bigger than him.
I love the fact Islam's trying and not looking for the easy fight. But I think JDM is being underrated here and I believe this plays out like Adesanya vs Blachowicz. If Islam does lose to JDM, I really hope he doesn't just turn and run back to LW immediately.
The current crop of top WW's... JDM, Prates, Buckley, Garry, Brady, Morales, Shavkat (meh) will be around for the next few years. If Makachev does run and gun with them, it's a solid addition.
Wonderboy, Colby and Kamaru are each one loss away from reitrement. There are probably more questions about Belal going up than there are with Islam, but he's good for another couple fights and the UFC will feed him to the top WW's. MVP can't have too many fights left.