We have been steadily watching! Finished season four last night. It's really good for the most part! I actually don't recall when I tuned out, I suspect it was at some point during season five when Donald left, but I didn't remember the bulk of the latter episodes of this season. It also felt super short (yeah just checked, only 13 eps). But I really thought it was great for the most part. Intro to Knots was probably the series' nadir thus far, just really boring, but I enjoyed the Abed/Troy switching places episode and felt it was quite touching once the bit was revealed, I really enjoyed the finale despite its stupidity and total suspension of reality, the origins episode was fantastic. My only problem with this season (and parts of three) are that the writing for several characters got sloppy. They really, well, Britta'd Britta, reducing her to a dumbass psychology hopeful, and that gag was insanely overused (I enjoyed the episode with Jeff's dad aside from Britta's involvement in it, which was probably the worst thing I've seen in this TV show thus far), Pierce stopped getting any decent exposition (which I recall at the time was due to a range of off-set issues with him being a prick). There was a fair reduction in most of the characters to caricatures at times, and a lot of jokes being overused, which was a shame, although for the most part I felt the show hit a lot more than it missed.
Interested to see how I view the final two seasons!