Well Valverde took over from Bielsa, so the team was already used to ultra offensive pressing style. Besides that Bilbao is just different, not only because of their very own special philosophy (so working with youngsters is pretty much mandatory) but because they are a small club in general. Bilbao already started to become more boring again after Bielsa left though, at least i don't remember watching them that much after that because it wasn't as interesting anymore.
Managing and motivating a world class team is a whole different story and we saw the last 2 years how Valverde reacts to these different circumstances. Always choosing the safe route, always playing the same seniors, not developing young players etc we all know it.
That can happen with almost any coach of course. At smaller clubs taking risks and developing youth players often is the only way for success because they don't have Messi that can win you the games on his own. So besides the few proven world class coaches it's very hard to predict how a new coach would react to the powerful seniors, to having Messi, to having a huge transfer budget every summer etc but it's still worth a shot if the alternative is keeping Valverde.