Guess if they wanted another fast bowler Rashid was the obvious casualty. Pity , because he's been pretty handy in ODI - and generally hasn't had a bad tour all round. But they have to do what they think will help win games - and develop bowling combinations for the future.
On the last point : I am less bothered than many about issues of Morgan - Billings - Bairstow , etc . England need more than eleven players who can be used in the side , surely ? Australia , for example , don't mind resting players : they have a solid squad who can do a job ; and have gained that partly by giving opportunities to fringe players when it suited...
I don't actually think Morgan is any tactical genius ; but he has been a successful captain in ODI and (even if he has slipped a bit recently as a batsman) still has the potential to play the odd brilliant innings : I see no need to rush him out the door. I do hope the other batsmen get chances to show what they can do ...and I'd imagine minor injuries and rotation should enable that to happen. If Morgan really does demonstrate that he's past his sell-by date then fine - they have the replacement.
Bowling first. Four early wickets again would be nice