Happy about that. Ozark is great and all great things must come to an end (or stop being great).
I also think that going into a season knowing it is final is a good idea. It opens up design space as well as setting expectations.
Fantastic news that the final season will be 14 episodes. Some shows taper down episode count towards the end, which leads to "action packed" but ultimately unsatisfying episodes, as exemplified (in my oppinion) by game of thrones last seasons.