Here is a collection of surveys of scholarship on Mark. I couldn't find one which summarised text-critical work on Mark's Gospel.
Surveys of Scholarly Literature:
R.S. Barbour, ‘Recent Study of the Gospel according to St. Mark’ Exp T 79 (1967-68), 324-329.
H.C. Kee, ‘Mark as Redactor and Theologian: A Survey of some recent Markan Studies’ JBL 90 (1971), 333-336.
H.C. Kee, ‘Mark’s Gospel in Recent Resarch’ Interpretation 32 (1978), 353-368.
S.P. Kealy, Mark’s Gospel: A History of its Interpretation, From the Beginning Until 1979 (New York: Paulist, 1982).
D.J. Harrington, ‘A Map of Books on Mark (1975-1984)’ BTB 15 (1985), 12-16
W. Telford, ‘Introduction: The Gospel of Mark’ The Interpretation of Mark (ed. W. Telford; Edinburgh: T&T Clark, 1985), 1-41.
L.W. Hurtado, ‘The Gospel of Mark in recent study’ Themelios 14 (1989), 47-52.
W.L. Lane, ‘The Present State of Markan Studies’ The Gospels Today: A Guide to Some Recent Developments (The New Testament Student VI; ed. J.H. Skilton, M.J. Robertson III & W.L. Lane; Philadelphia: Skilton House, 1990), 51-81.
F.J. Matera, What are they Saying about Mark? (New York: Paulist, 1987).
M.M. Jacobs, ‘Mark’s Jesus through the Eyes of Twentieth Century New Testament Scholars’ Neotestamentica 28 (1994), 53-85.
W. Telford, ‘The Interpretation of Mark: A History of Developments and Issues’ The Interpretation of Mark (ed. W. Telford; Edinburgh: T&T Clark, 1995, 2nd ed.), 1-61.
P.G. Bolt, ‘Mark’s Gospel’ in The Face of New Testament Studies: A Survey of Recent Research (ed. S. McKnight & G.R. Osborne; Grand Rapids: Baker Academic, 2004), 391-413.
K.W. Larsen, ‘The Structure of Mark’s Gospel: Current Proposals’ CBR 3 (2004), 140-160.
D.J. Harrington, What are they Saying about Mark? (New York: Paulist, 2004).
W. Telford, Writing on the Gospel of Mark (Guides to Advanced Biblical Research 1; Blandford Forum: Deo, 2009)
C. Breytenbach, ‘Current Research on the Gospel according to Mark: A Report on Monographs Published from 2000-2009’ in Mark and Matthew I: Comparative Readings: Understanding the Earliest Gospels in their First-Century Settings (ed. E-M. Becker & A. Runesson; WUNT I.271; Tübingen: Mohr Siebeck, 2011), 13-32.
H. M. Humphrey, A Bibliography for the Gospel of Mark, 1954-1980 (Studies in the Bible and Early Christianity, 1; New York: Edwin Mellen, 1981).
H.M. Humphrey, The Gospel of Mark: An Indexed Bibliography 1980-2005 (New York: Edwin Mellen, 2006).
F. Neirynck (et al.), The Gospel of Mark: A Cumulative Bibliography, 1950-1990 (BETL 102; Leuven: Leuven UP & Peeters, 1992).