Surprisingly (because Eilish is not my thing) I liked their gala performance at Rostelecom a lot. I don't love Survivor for them, maybe because there isn't enough softness to contrast with the high energy stuff... Hopefully they'll come up with something next season that capitalises on their long lines.
BTW I just listened to an interview in English from a couple of months back - Tiffani and Jon have the most fascinating accents! Tiffani maybe 90% English, with a hint of some other accent maybe from living in France and Russia for so long... Jon sounds 50:50 Russian:Aussie to me. It's pleasantly startling to hear a Southern Hemisphere accent from a Russian national team skater