Finished a marathon of Seasons 1-4 chronologically. If it's been a while and you don't remember details of the episodes, I'd say this is the way to go. Small plotlines, minor characters, personality quirks all get revisited.
I wasn't initially a fan of the 4th season as I was watching it, but kind of got into it by the 8th or 9th episode. On the whole, they were really still the Bluths we'd come to know, although the holder of the moral compass of the family kind of faltered. Much like Superman did in Man of Steel.
And yeah, for me the biggest distraction was Portia DeRossi's bloated face. George Michael, on the other hand, got far more angular.
I look forward to further Bluth adventures. Hopefully with a bit more of Buster next time.