I have to admit that EB1 for the rest of FY2018 has been bugging me, since movement has not been mentioned.
CO in his presentation showed that unused EB3 visas Fall Up to EB1
Attachment 1342
Only when demand from EB1 has been satisfied can visa numbers Fall Down to EB2.
If EB2 wishes to benefit from any unused EB3 visas, then a prerequisite seems to be that EB1-India and EB1-China would first need to be made Current to encompass all possible demand in EB1.
Due to interview delays, it's possible, despite a large numbers of pending applications, that the demand in EB1 does not materialize within the FY and the visas can then Fall Down to EB2.
On the other hand, if CO does not make all of EB1 Current, then by his own logic, he cannot give any spare EB3 visas to EB2.