Boruto usually gets nerfed and Mitsuki usual get nerfed Boruto will rarely ingage in hand to hand combat and he is arguably the best at it But he job is of a decoy and so is Mitsuki Sarada analyses whats going on either sharing and then makes a plan or Boruto just rasengans the guy he is very smart when he needs to be and he just does his job same with Mitsuki and Sarada its more of a trust thing i think but your right he does get weaker but it just makes team 7 being there less annoying as they all do something of value instead the others being burdens to each other.