Well, if, at that moment, Sakura had reached or had come really close to Tsunade's level (which I believe she did), she did "catch up" to Naruto and Sasuke, if by that we meant that she didn't need to be protected by them, and could fight alongside them.
I don't believe she was exactly equal with either Naruto or Sasuke's fullpower, no, but still, Tsunade had proved to be able to stand up for a while against Madara (who was surely superior to Naruto and Sasuke at that time), so, Sakura gaining a similar power/strenght of Tsunade's means that she could be placed on a similar tier of Naruto and Sasuke...I would say, kinda like Tobirama was in a similar tier of Hashirama and Madara, but was not as strong as them (I am not saying Sakura is as strong as Tobirama, though, since Prime Hashirama was clearly stronger than Naruto and Sasuke XD).