DS9 pretty much did exactly what TNG did, just more broadly. Its being set in one place meant that secondary characters like Rom, Leeta and Kassidy Yates could span multiple episodes and have some degree of character progression attributed to them. But it wasn't really "story arc" television. It certainly was not serialization.
I'm glad to see somebody else saying this! Some DS9 fans on the forums go nuts about how serialised DS9 was... but it really wasn't. It was a good show, don't get me wrong, but serialised? Not really.