So is this ROM finished now where there are no more updates going to be done?
It's never 'finished'...
I'm still working with the guy who designed CarbonFibers to try and fix that... there's commits on gerrit which are being bounced around to try and resolve that issue.
Once that is done, the ROM should be good for official and can build nightly. Otherwise, I don't see the point of rebuilding it every night myself unless there's some big fix - IE CarbonFibers, or adding MultiWindow like I did last run.