As you know, you currently do not receive any credits when receiving a duplicate Arpeggio ship, this is intended and will not change.
However, as we appreciate that effort should be rewarded, every Arpeggio ship you earn a duplicate of will reward you with an additional port slot immediately that is yours to keep!
In addition we have received some messages about Arpeggio content that is in the game client, but not part of our current mission set. Since we don’t want the enthusiasts and collectors among you to miss out on any content, we have a solution!
After the end of the current Arpeggio missions, any players that either finished a duplicate mission or earned either Takao or Nachi, will receive the three missing avatars (Iona, Chihaya Gunzou and Yotaroh) and the Arpeggio flag.