Replacing players like Tony Kross or Modric will be very difficult. They are really making a lot of effort to try to make Real Madrid a team that can compete with Barcelona, but they are really struggling, we need to be patient.It takes time and perseverance but I'm confident they'll get there.
Why are you trying to make it sound as if without Kroos and Modric Real Madrid wasn't already beating Barcelona and winning trophies! Real Madrid is never in competition with a team like Barcelona, Real Madrid sets the record that even Barcelona is trying to follow in the league, instead it Barcelona that's in competition with Real Madrid. I understand your take, but don't make it seem as if those two players were the ones that took Real Madrid to the standards it has attained.
Toni Kroos and Modric are indeed great players, and they've also made significant contributions to Real Madrid. Although something is different when Toni Kross is no longer there, but a team as big as Real Madrid shouldn't rely on just one player for their football. Real Madrid signed Xabi Alonso for a reason, as he is expected to bring Real Madrid back to their glory days with the squad he built. So even without Toni Kroos and Modric, that can't be used as an excuse for their poor performance.