I've been really enjoying this season so far. I'm glad though that the three recent episodes ended on a less bleak note than the first episodes; I almost got a bit annoyed because the first season hadn't been as downbeat.
I have to revisit season 1 again, but it seems to me that Harmon and Roiland did step up the writing. I really dig the plot premises, e.g. the memory parasites, the mini-verses or the parents fighting their monster versions, and I'd also say they stuffed more details and references in there, some of which you'll hardly notice. Obviously, Community had that as well.
Yup, that was superb.