RBD
Agree re performance data. Is the 737 landing performance now based on OLD / FOLD calculations opposed to the old style ‘actual’ data. The wording in some posts suggest the latter, if so then either Boeing - tardy publication revision, or Operator - not using the best available data, might get a hard time from the FAA.
Re standing water; there are subtle differences between not knowing due to inaccurate surface descriptions, or if reported not ‘knowing’ because the previous information was not checked, based on what could be deduced - WXR etc, also not knowing or not seeking the best data at all. The dividing line of professionalism.
Where crews have followed procedures, this should not be taken to imply that the procedures are sufficiently accurate or have considered a wide range of situations.
CS 25.1591(~page 199) and particularly CS AMC 25.1591 (~page 878) give salutary enlightenment of the limitations in calculated performance.
Of note, these sections do not appear in the corresponding FAA documentation - non harmonised rule making.