Yes, as far as I have been able to find, there are five dissertations (one of which is my own) that have been completed on Adrienne von Speyr's writings. They are:
Berg, Blaise R. "Christian Marrige according to Adrienne von Speyr," S.T.D. diss., Lateran Pontifical University, John Paul II Institute of Studies on Marriage and Family, Rome, 2003.
Matro, Justin. “Christian Suffering in the Spiritual Writings of Adrienne von Speyr.” S.T.D. diss., Gregorian Pontifical University, Rome, 1999.
Schiettecatte, J. “Disponibilité aimante: L’attitude d’amour johannique chez Adrienne von Speyr à la lumière de l’exégèse contemporaine.” S.T.D. diss., Teresianum Pontifical University, Rome, 1998.
Schmidt, William. “The Sacrament of Confession as Sequela Christi in the Writings of Adrienne von Speyr.” S.T.D. diss., Lateran Pontifical University, John Paul II Institute of Studies on Marriage and Family, Rome, 1999.
Sutton, Matthew. "The Gate of Heaven Opens to the Trinity: The Trinitarian Mysticism of Adrienne von Speyr." Ph.D. diss., Marquette University, Milwaukee, WI, 2007.
I have heard of others in process and look forward to promoting more dissertations on von Speyr's vast theological and mystical work.