The Corey fight was only two years ago, Glover was 38. Thats not a young prime Glover. Glover's prime was extended by the MMA gods as repayment for being stuck out the UFC so long for visa issues, but the guy is still 40. He's a great 40, but still 40.
They probably still win. Just a style matchup thing. Glover's two weaknesses are being pushed back by pressure wrestler and guys with speed who can bang in the pocket. Davis and Corey should be able to do what they did again. Beating Robertson, Cutelaba, Krylov, Smith, and no knees Santos doesn't show that Glover would be any different in those matchups. He's 40 now so it might be even worse.
Always a chance he catches Corey with something but Davis has a really good chin.
I love Glover, from back in the days of mocking Shogun fans because their boy ducked Glover. But he's not the top of the LHW division imo. He hasn't fought the real threats in the division. Thiago was one of those threats a year or so ago but he seems shot from his injuries. The Thiago that starched Jan would also starch Glover.