In his editing for the 1837 edition, Joseph Smith changed two cases of the archaic “how great things” to “what great things”—here in 1 Nephi 7:11 and in the title page. But six later occurrences in the text have been left unedited. For complete discussion, see under the second paragraph of the title page.
Summary: Maintain the earliest textual reading of “how great things” in 1 Nephi 7:11.