Also with a younger squad there will be more subs so this will allow Ernie the luxury of more tactical options, including blooding younger players if the game is in a situation where this is possible.
Musa seemed not to bad last time and reports from England were promising. Any reason he hasn't picked up another club there or a pro club somewhere? Doesn't want to end up like Jack Pelter (IIRC) the guy who went to Roy Keane's Sunderland and then didn't kick on.