On the current visa bulletin it lists a backlog for EB-3 all other chargeability. Because unused numbers flow from fourth and fifth to first to second to third (but not other workers which are capped), if there is a waiting list for EB-3 that means there likely won't be any extra numbers in the whole employment based category this year. Not a bad idea if there were though.

If it were up to me I would eliminate the DV lottery (50k visas) and reassign those numbers to EB as well as eliminating the per country caps. F-2B (26k) and F-4 (65k) are also ripe for elimination IMO. I'd probably also move parents of USC to F-1 from IR.