Is "Feral Concurrency Control" a disparaging description?
Sorry for coming to this issue so late. For context, I am one of the coauthors of the paper. The term "feral concurrency control" in the paper was inspired by the common usage "feral database" (similarly "feral system") said by IT admin people, to refer to databases or systems that were run by staff outside the control of IT services. For example, a university department might keep a database of student information, separate from the centrally managed official student record system. See https://en.wikipedia.org/wiki/Feral_information_systems 

The connotation is of something that has escaped from control and is acting wild (like a feral cat is a cat that is, or descends from one which, escaped from domestication and became wild)