The process of producing Season 5B was a rollercoaster, with the ending having to be rewritten once Netflix uncancelled it and gave an order for Season 6 as the latest of multiple times the show has been rescued from cancellation at this point.
Season 6 does truly seem to be the end, however.
The additional good/bad news?
The last day of production on the final episode was back in March and after those episodes air, the show will actually get the chance to end on a note it can be proud of.