Larsson should have big pull on Central European and British talent. He's not strictly a huge personality himself, more of a Raul type guy, but jump from Valverde, Setien and Sarabia to Koeman + Larsson is really substantial for the dressing room confidence.
As an RM fan I'm liking these appointments less and less given RM said there'll be zero changes this summer. Your coaches will be held back by finances and it's difficult to tell how you can gel this tactically (as long as Messi is there you'll be doing damage control) and depth will hurt you since you'll need to play the seniors you keep at least once a week (games every 3 days almost throughout the entire season), but there'll be less consequences to personal decisions during matches when they choose to field less senior players.
It might not be better, but it will be less predictable and more interesting to watch.