Matlovsky's "I, Mudd" score is more interesting than I remembered. Not exactly easy listening, rather edgy and experimental, but it has its nice bits. I wonder, though -- was any of Matlovsky's work tracked into other episodes? I don't remember hearing any of it reused.
Don't have the set (yet), but I distinctly remember a memo in the Roddenberry papers at UCLA saying that the producers were unhappy with Matlovsky's work and didn't want to work with him again. Based on that, it doesn't surprise me that his work wasn't tracked into other episodes.