I am not convinced that because now there are more D appointed judges on this circuit, it necessarily means they will vote party line. Probably the last 3 who are Obama appointees will go for the Administration without question.
But some of the more seasoned judges have a history of being more straight down the legal line. I.e., Harry Edwards. He was appointed by Jimmy Carter, but ruled vs. the Obama Admin as part of the panel. Some of them have a mixed background, politically. I.e., one of the Clinton appointees had clerked for SDO.
I wonder when the last en banc hearing was, and what the subject and/or parties were.