R&M has subplots but episodes are basically self-contained, so it tallies with your stated preferences really.

I though that episodic tv was on the way out and that arc's and mythology where more important.

Episodic tv takes skills to do properly, in this day and age. People now expect even side-characters to be fully fleshed out, and that’s difficult to do in a short amount of time. It’s also clear that a lot of “hot” showrunners, while great at building suspense and devising cliffhangers, are actually pretty bad at ending stories, so a more serialised approach allows them to kick the can down the road (e.g. Lost). After all, you become famous by generating interest and expectations, not by actually fulfilling them.

Put another way, what's ruining Netflix isn't the cancellations, it's the obsession with extremely long serialized soap operas over good episodes, miniseries and seasons.