There are pro's and Cons to bringing in a team from the previous generation of platforms.
New team, new concepts based around an existing platform. No more re-inventing the wheel. Use the flipping thing as others do, and stop rewriting the Ops Manual.
You would like to think that lessons learned from earlier platforms would not be repeated. I am too cynical to believe that would happen.
Old team, old thinking, and a desire to turn this into MRA4.5 will appear.
Nothing will be good enough, everything will be compared to MRA4 and will be unacceptable.
I think this last issue will be the biggest concern but I do hope all the MRA folks can keep some kind of job, even if it involves being told not to change anything and to live with it as it is.