So, anyone watching season 6? (Which Netflix claims is Season 4 and which the first episode also references by having Rick say that Morty has "******-**" up the first episode of season four.")
I'm not finished them all, but I think the quality is still there. The whole family seem to be involved in interdimensional travel and meeting aliens now. It also self-references a great deal, so it isn't something you could come to watch and understand without having seen earlier episodes. There is a Fantasy episode with a take on Dragons, and a 'breaking of the fifth wall' episode.
Edit: Err... forget what I said. Netflix does have 6 seasons and I've only seen 3 or 4 apparently, so I have a lot more to watch. Which must be a good thing.