Gorka's likely absence from the Christmas special might hint at him leaving. I remember Ola & Kristina didn't do it when they were eliminated early in 2015 and that was the last year for both of them. Not sure that things were great between them and the show, Ola's departure was definitely an acrimonious one and I don't think Kristina was really happy that year.
Then again, Brendan did it in 2017 after Shirley gate and got given a farewell win so it might not mean anything.
Then again, Brendan did it in 2017 after Shirley gate and got given a farewell win so it might not mean anything.