The movie's entire purpose was to finish the series. It was an homage to the fans. In that sense I thought it was great. Kind of like firefly/serenity. I think it was HBO finally acknowledging they fucked up by canceling the series way to early.
Power's Boothe passed before the movie was filmed.
Yeah, I think Rome could have gone for as long as they wanted to do it. There's more than plenty for them to work with.
Deadwood did have a shelf life. It should have gotten another season, but they were winding down into The West rather than The Wild West. I mean with that cast, it still could have worked just fine and been entirely worth watching. But it was reaching a natural and satisfying conclusion. Not a HAPPY ONE, but a satisfying one. The final season they kind of ran out of shit to do with Jane and it was getting a little labored for her character.
I thought Rome got cancelled because of how expensive it had become to make
The Cinecitta fire happened months after second season aired and about a year after the cancellation decision was made. Also those big productions have mandatory hazard insurance and they weren't owners of any set, so that fire didn't cost them money at all.It was that combined with a fire that destroyed most of the sets IIRC.