Unrestricted mereological fusion has been widely criticized as too permissive.  It allows for so-called scattered objects (e.g., the sum of the Eiffel Tower and the Moon) and in the case of Goodman’s construction in The Structure of Appearance for sums of radically different kinds of objects, like sounds and colors. W.V. Quine, after endorsing this principle in a joint paper with Goodman (Goodman and Quine 1947), becomes one of its first critics in his review of The Structure of Appearance: