Yes I agree Adesanya's style is suited for mma, probably more so than pure kickboxing. Adesanya can handle his power, but it can put him out. Adesanya knows this himself and that's why he fights the way he does vs fighters with KO power. His chin isn't his strongest attribute, it's good but not great. He is still susceptible to KOs and gets rocked by heavy strikes.
Yes I've seen the video with Rumble. But Adesanya even said he didn't want to get hit with those bombs and knew it would be a problem if he did. Adesanya will use his speed, skill, and movement to win the fight. If he does get clipped though Adesanaya will be in trouble, especially if Jan is able to capitalize on it. 5 rounds is a long time, remember Kelvin almost TKO Adesanya in a 5 round fight. If Jan does find himself trapping Adesanya against the cage or catching him on the inside by pressuring him that would give Adesanya problems as well. His losses in Glory were fighters pressuring forward and not letting Adesanya fight at long range. They never let him really set and Adesanya was always on the back foot trying to avoid fighting on the inside. That's a hole in his game/style that he may not have fixed yet. He just likes to throw the combination he used vs Whittaker and Costa (which is also the same combo that KO him) in that range then reset and keeping distance on the outside.