Would be a short and sweet Title Update rendering the map pack incompatible.
Then release a new, compatible map pack and put it on the marketplace the right way for a change.
Honestly, they should’ve tested these kinds of things WAY before they even considered selling Wargames Map Passes…
EDIT: Another way to fix the problem would be to release another map pack, that would be paid, and having Crimson be free. This way, people who paid for a map pass or LE will still get their promised 3 map packs.
I’m sure they’ve got some prototype maps lying around that “weren’t good” enough. A simple redesign or remake map pack would do, too.