It's misguided to complain too much about Modric leaving.
We've had 4 of his best years and he's now one of the best players in the world. If he wants to move to one of the biggest clubs in the world it's pretty lame to insist he stays. It'd also be couterproductive if he grows resentful, which he didn't last year which is enormously to his credit. Let him go. Not to Arse or Chelsea...but RM or Manyoo, meh, I don't begrudge him those moves.
Besides, I think there's an argument that our team is too dependent on him. It is TERRIFYING how much of our game flows through him...he's a metronomic fulcrum around which our entire game revolves. As great as that is, there's something slightly disconcerting about it.