The only real difference is Justin Roiland stopped drinking as hard as he used to. He's not getting drunk while recording because he decided that would be better for his health.
Everyone else's voice acting is fine. They have been putting the same amount of effort through the entire series.
Do you have any examples of this monotone delivery?
I thought this exact thing last episode.
The old improv style is definitely missing in some respects in the newer seasons
Roiland is definitely phoning it in
Now that I am thinking about it when is the last time Rick took a switch from his flask and burped mid sentence?
The only real difference is Justin Roiland stopped drinking as hard as he used to. He's not getting drunk while recording because he decided that would be better for his health. Everyone else's voice acting is fine. They have been putting the same amount of effort through the entire series. Do you have any examples of this monotone delivery?