I think the Eastern U.S. is the obvious and better place to hypothesize a Nephite presence, for doctrinal and geographical reasons including the fact that the only Nephite artifact we can definitely source was found in the hill Cumorah, in upstate New York.
In any case, here's new evidence about a Mayan "megalapolis" just discovered: https://news.nationalgeographic.com/2018/02/maya-laser-lidar-guatemala-pacunam/
If I esteem mankind to be in error, shall I bear them down? No. I will lift them up, and in their own way too, if I cannot persuade them my way is better; and I will not seek to compel any man to believe as I do, only by the force of reasoning, for truth will cut its own way.
"Thou shalt love thy wife with all thy heart, and shalt cleave unto her and none else."