For what he's touted as, Adesayna gets hit far too much at the moment to be the second coming of a prime Anderson. He's susceptible to a doubled-up jab or hook at the moment, too, as he commits reflexively and probably trusts both his chin (and/or rolling with the punch) and counter power to win these exchanges, but it's incredibly risky and I wouldn't fancy that carrying through challengers as a champion.
Think I mentioned his propensity for getting hit in here before now; Whittaker, with those wild, over-committed swings, did Adesayna a favour and I feel as though with more composure and less inclination to try and put on a show for his home crowd, he could've presented a more complex opponent than a rock 'em sock 'em robot who was priming himself to get sparked out as he did. Kudos to Israel for indeed exploiting the openings, but Whittaker made it as easy a night as it could've been in his hastiness.
I don't think Romero has the stamina or output to bother Adesayna, personally; if the latter uses his length and kicks, Romero will be reduced to a few explosive shots per round and Adesayna deals with those expertly.
Costa and his barrelling barrages presents a different problem, whatever drugs he's on have him peaked in output and he is relentless whilst throwing non-stop haymakers - if Adesayna can knock this guy out, or even make him fight at slower pace (show him respect), it'll be impressive. It's one hell of a test for a newly-crowned champ, and it speaks volumes for him that he'd take that kind of risk off the bat.
re. Jones: If they do ever fight, I think he'll beat Jones. Not because he's a better fighter, but because Jones will want to beat him at his own games, and in terms of hands (throwing punches), Adesayna is light years ahead of Jones and will actually humiliate him in any exchange of that type. If Jones went into the contest utilising all his assets on top of his size, weight and experience advantage, he'd wrap this kid up quite easily in the pocket, but Jones hasn't fought with regard and respect for an opponent since dismantling DC, more playing around in there and showing everyone how brilliant he is by beating others at their own game, which would be a mistake if he goes for kickboxing (not Thai) against Adesayna.
All eyes are definitely on this kid's next bout, though, and say what you will, his willingness to step into high risk zones both figuratively and literally will catapult him into elite referencing sooner rather than later if he comes through as the victor. He definitely doesn't look like a cherry-picker or someone who will duck any opponent and that's one hell of a way to go about being a champion.