We're still over a month away from the Netflix launch of David Fincher's Mank, but critics who've seen the auteur's new black-and-white Hollywood drama are now weighing in. The folks who were able to watch Mank in advance of its December 4th Netflix release took to social media on Thursday to react. In doing so, we can now get a better feel of Mank's awards season chances and a clearer picture of how Fincher's big creative swings shape up. Working from a script written by his father, the late Jack Fincher, the …