A new article by Ervin Budiselić does not focus heavily on the Pastorals, but I mention it here because of its obvious relevance for 1 Timothy 5:19, which is discussed on pp. 189–90. The article is available in its entirety at the address cited.
Budiselić, Ervin. “The Church as a Court: the Requirement for ‘Two or Three Witnesses.’” Kairos: Evangelical Journal of Theology 15.2 (2021): 179–94. https://doi.org/https://doi.org/10.32862/k.15.2.3