while it seems a bit hidden from common view, I did find the "Places" editor of FamilySearch.org.
However, I cannot find an option to even suggest or ask for a merge of two (or more?) places that are actually the same.
As an example, searching for Sîndominic yields two, slightly different place markers, pointing to the same village, having separate IDs, even though it's quit obviously the same village:
I understand and can accept the need to manage location updates, not just let anyone willy-nilly change things, but I feel the process is much too difficult to quickly update multiple facts of a place, if I strive for a cleaner database.