Jumbo is now missing that link between flat & high mountains. Kuss also isn't as good at setting a defensive tempo as Kruijswijk was (which figures considering even in his best years, he was a diesel engine rider). It means Ineos & UAE could blow up everyone except Kuss in the Pyrenees, at which point Vinegaard himself is going to be jumping on attacking riders (one rider, specifically, i.e. Pogacar).
In my mind the situation has gone from Pogacar needing a miracle (an unlikely Vingegaard collapse mano a mano) to a more interesting situation where he could technically launch a raid & leave Vingegaard isolated behind.
I think Kruijswijk in his current form was very, very important for Jumbo Visma.