I think one of the three original JP girls should have arranged to stream straight after the evening's debuts to take advantage of the large audience that was there already. Otherwise went pretty well, overall - between 1600 and 1800 CCV is a huge boost for Phase in Japan, and there should be some opportunities for fun interactions between the old and new members in JP and between JP and EN.
I wouldn't be surprised if we had another gen of JP talents before the end of the year, and they're going to have at least double the CCV of what they got this evening.