While we all recognize this is a change from the past, when Church leaders reaffirmed the New York Cumorah, this has always been the position of the Church regarding locations other than Cumorah.
That being the case, why has Church art always depicted Mesoamerica?
And why does Church art continue to depict Mesoamerica exclusively?
Here's an example of a painting in the Gilbert temple that has been used in lots of places. It depicts Christ visiting Mayans in a scene from 3 Nephi.
This painting teaches M2C far more powerfully than the words of neutrality in the Gospel Topics Essay.
I've cited lots of other examples, including the cover of the Ensign through the years, which has always depicted M2C and never the New York Cumorah.
Just search for "artwork" on this blog and you'll see more examples, such as these:
Example from the Deseret News:
Example from the Church News: