Shortly thereafter, the synagogue was renamed in honor of their earlier shared benefactor Judah Touro.
Under Leucht's leadership the synagogue further adopted the innovations of Reform Judaism that Gutheim introduced.
According to the Touro synagogue website, in 1881, the second-day observance of the holidays was dropped; in 1889 Shabbat morning worship was abbreviated to "last not longer than one hour including the sermon"; in 1891 the congregation decided to allow worship with or without covered heads, depending on how long one had been a member.
Along those lines, he contributed an article entitled "The Mysteries of the Book of Esther" to The Southern Presbyterian Review.
Regarding Leucht's Jewish communal work, his great grandson, Bill Rosen, in a nostalgic letter detailing his own departure from New Orleans after Hurricane Katrina, wrote that during his great-grandfather's years in New Orleans, Leucht "started or helped develop every major Jewish institution of his time - he built Touro Synagogue, laid the corner stone of Touro Infirmary and worked ten years to develop the Isidore Newman School," institutions that continue to service New Orleans.