On 10/6 I purchased a RT itinerary Cedar Rapids-HNL to match the same routing as my wife/2 kids on award tickets (E- seating). 1K agent was aware of the new policy and moved all 3 up to E+ with me.
However under their reservation on .com it still says "Add Economy Plus" (even though they clearly have E+ assignments), and I am not able to change their seats without it trying to charge me. Still a great change. Would have have been a fair charge to upgrade 3 to E+ roundtrip to HNL.