There had to be some point where the staff were going to stop doing the departure features, it just happened to be during the time that Tony and Rachel departed, whether it be now or in a few years time. It just happens that it was now. Maybe they should have made an announcement about it, I don't know, but there is nothing and no-one stopping the fans from continuing discussion in the Tony and Rachel discussion thread.
Let's just thank Dan and his staff for all the work they do and will continue to do because no-one is making them do it and they aren't getting paid money for it. A little thank you every now and then isn't a hard ask I think.