The only way either Ek or Kaprizov get traded is if they demand to be traded, and there is no indication that either of them will do so.
There are many reasons not to trade Ek or Kaprizov, but the biggest one is that these are the guys you want to build a team around. If Yurov or Rossi can't play with them, then it's those guys we need to look at trading, not our cornerstone pieces.
But we could trade them and then instantly fail at replacing them for the next ten or twenty years.