Much like previous seasons of this show, the consistency of the comedy is really one of its main selling points. Of course if you do not find it funny or to your taste then this is a moot point, but for me my sense of humor does seem to fit the creative, silly, crudity of this – particularly in regard to the fast and funny dialogue. The fourth season opens with Archer having lots his memory and living a normal life (in another TV show); a narrative which really doesn't offer a great deal apart from that joke. From here we have some plots that bring back in reoccurring characters of Barry and Katya, but mostly they are standalone episodes. The vast majority of these do their job – which is to create a frame for the characters to be their usual selves, and the dialogue to snap and fizz back and forth.
There are a few weaker moments in there – or elements that don't wholly work. Outside of his one episode, the addition of Ron Cadillac seems a fairly pointless character to have floating around. Other than that, the final two-parter at sea does feel like a bit of a retread of the season 3 equivalent in space, but not as funny or well plotted. Mostly though it does work. In terms of the cast, there are the usual scattering of bigger name cameos ranging from Timothy Olyphant through to Jon Hamm, however it continues to be that the lead performances are the best. Not only do they get the best lines, but their characters are consistent and their timing is good. Hard to pick a favorite from them, but Walter's crisp delivery is always fun, while Greer is a hoot and makes her silly lines work very well.
Season 4 may not be perfect, but it is consistently funny with good dialogue, well-structured running jokes, and generally very good delivery and timing from the cast; all of which make it deliver in the most important ways.