There were a few good episodes, the Santa time travel one, the multiverse one, the mom Corp one. I liked the dune one even though it's got mixed reactions.
That episode 9 was a fucking train wreck, however.
That's a weak defense of the season. The thing that made a lot of the classic episodes classics is that they are more or less timeless. If releasing the episode a year or two later means it's not going to land well, then they should be rethinking the writing.
A great example is the iPhone episode. Its a bad episode because the premise was hardly interesting even when it was relevant, and it hasn't aged well at all.
Original run writers room had a math phd, chemistry phd, and comp sci phd on the team. I think that's why any of the post cancellation seasons fail to capture the wit of the first run.