Just relax and wait.
777 is now at the zenith. 777F will come. It will still be a good roster but everybody will have his fair share of freighter flying. BOM is also going back to the 777.
Wait for the 350. Airbus will have the most interesting flying in the company.
But yes, I agree that those FO's should do 2 years in the right seat first. Basically they take a command slot which should go to a more senior captain.