To be fair, it’s been a long time since we’re seen Gillian on a public appearance. We barely had footage from Glastonbury, she cancelled the panel in Maine, and I don’t even remember when was the last time she did a real interview or anything that would show her face for more than 3 minutes. So it’s really hard to say how she is right now, if she’s glowing and happy or not. David didn’t look ¨that* happy at the SDCC, but that’s his face whenever he does a con without Gillian. He wasn’t different when he was doing them with Mitch, for example. He’s a moody deadpan man of few words, so I didn’t see anything wrong in his behavior during this panel.
So I don’t want to jump on conclusion based on pretty much nothing to say how bad they’re looking right now. Filming starts in 10 days, it won’t be long since we get a hint of their real mood.