Aloha !

He sings very differently nowadays. His higher register is completely gone, he's just able to go higher with his lower register. The clear sound he used to have from 1986-2003 is completely gone, so no, he won't be able to pull it off. He still often sings "know...live...rain" instead of "you know you're gonna live through the rain" and I can't see it change anytime soon. He's able to hold the notes a lot longer than a few years ago, but if he has to do it very fast as in Keep The Faith he's lost, which is why the songs from the first 2 album sounded so horrible when they did those live this tour.

Salaam Aleikum,
Sebastiaan