>>534332514
Alice, Yuzuha and Piper are an amazing team. Focus on leveling them up 100%. Alice was probably a better pick for you than Yanagi so it's not a bad mistake. Yanagi really wants Vivian or Miyabi.
Since you have a great team to do most of the content with, I'd save until a new team comes out that you really like. Keep an eye on the Idols or Obol. Hopefully by the time SEED and Orpheus comes out you should have a nice stash of polychromes playing through the story, doing missions and permanent events.