Feels like a "Y'all must've forgot" match to me. Waldo's success astounds me. He is so unremarkable as a fighter, even by HW standards. de Lima wrote the book on how to beat him a long time ago and dudes are still struggling.
Still, I think his time is up. He was losing striking exchanges and getting clubbed with big shots by Spivak... a pillow-fisted, chinny judoka. Spivak showed zero fear of his power, which says a lot to me. He's lucky the judges favored him there. Waldo's boxing defense is decent, but Pavlovich has some of the most dangerous hands in the division. His own boxing fundamentals are solid, he throws good straight shots down the pipe at a high volume, and he'll enjoy a 6" reach advantage with more KO power to boot. True, he has looked gun-shy and "off" since the loss to Aspinall... but I think he just needed time to reset and this is a tremendous step down in competition.
Acosta represents a guy who will engage Pavlovich in his favored range, has a far more limited kicking arsenal than Volkov, and is still potentially somewhat vulnerable to the takedown threat. Pavlovich has more ways to win and I'd be fairly shocked if he doesn't. Acosta's only path to victory is to copy Volkov's homework and out-point Pavlovich on the outside while staying defensively sound and stuffing his takedowns... and I don't think he has the chops.