As for George Russel, though many have argued that he doesn't deserve the seat on Mercedes, I am still happy for him as he is now on a superior car. I just really hope that his seat in Mercedes won't be another Rosberg vs Hamilton feud where they both clashed as teammates.
I am not convinced that the development is that great for George Russel, but time will tell. He clearly deserves a good car and he has shown that he can do wonders in a Mercedes.. when Lewis was not there. Let's see how the things will go when Lewis is present, especially as lately he seems to be needing badly any help he can get against Max. Of course, that may be or may not be the same next year.
I am more curious who will fill the "missing spot" (left by Russel). Will it be Alex Albon or will it be somebody else? That part may be a bit complicated...
Bottas joining Alfa Romeo is a very good fresh start for him. His role in Mercedes was like the second man where he backed up Hamilton. In this way, his true potential was not uncovered. Now that he is no longer under the shadow of Hamilton, I am hoping that he would do really well next season. And about Russell taking his spot in Mercedes, whether that was a good decision or not we will see in the future. But till then, we are up for an exciting season up ahead.