I think the guys have outgrown themselves. They're just going through the motions at this point releasing their usual low-effort content. There are no more storylines; no more Plinkett Reviews; no more unique skits like the Nerd Crew or Science Man. They don't even bother with BotW gimmicks like Plinketto any longer. Mike's lame lists are the most unique thing they do these days.
Which it's fine. The guys are just getting older and don't have the creative and physical energy they had back in their early 30s. I still enjoy watching them. They haven't become irritating like so many other YouTubers do over time, and I'm guaranteed to get at least a chuckle or two from anything they release.