I think we had worked out that Johnny has to leave before Christmas before all the Carter reveals but I still kinda hoped he would be around.
The Christmas photo with the Carter Family minus Johnny is heartbreaking and as others said does not feel right

I know the Christmas Day episode is going to be amazing but the seeing them at the xmas table without Johnny is going to be hard to watch.
For me the Carter family photo will always be the one in the kitchen of them in white with Lady Di. I just love picture and keep looking out for it when they have scenes. I think I will doing more of this just to see Johnny's lovely face
In terms of the ending I am sure that Johnny will leave with the blessing of Mick and Linda which I hope means that he will returning to his studies in Italy maybe after spending Christmas with Luca. I always remember Mick saying how proud they were of Johnny going to university and what that meant to Johnny. Johnny is bright and wants to study to achieve his ambition of being a lawyer so any notion he would give this up just does not work for me and I would not like it at all.
We always knew the ending would be rushed and won't make a lot of sense. The best we could have hoped for was a nice ending and the door open for a possible return in the future which it looks we might get so I guess we have to be grateful for this. We can at least have hope this is not the last we will see of Johnny Carter.
I hate the idea of Johnny leaving but if his departure is about him gaining his indepenence and sharing his life with someone special it is a nice way for him to leave and gives us hope for the future. I really do hope Luca comes back and they leave together as they would make it make the ending even better. I am pleased to see Sam had some input in the exit and seemed happy in the behind the scenes pictures. I hope that means he left on good times with EE
We are now getting closure over Johnny's exit with a few details such as the date and whether Luca actually returns to be confirmed. It is all going to happen and we have to accept it but as Stephen said there were be a lot of tears to come