The 13th Transportation Squad of the PAF using CASA is
operates from Balice in Krakow (EPKK).
This is an international airport equipped with perfectly operating ILS.
They are used to ILS and 90% of their missions are ILS.
The flight on that day before crash was to (from AIP Poland):
EPWA ILS CAT II RWY 33.
EPPW ILS CAT I RWY 29L /Facilities flight checked not compliant to ICAO requirements contained in Doc 8071.
EPKS ILS CAT I RWY 30 /Military facilities NOT CERTIFIED by Civil Aviation Authority.
...and then
EPMI CAT II RWY 30 /INOP
...landing on PAR
Those boys were flying hundreds of international missions,
to Kabul, Bagdad etc. most of the time ILS.
They probably didn't train PAR approaches frequently.
On the other side the EPMI PAR officer(s) was (were) mainly
handling landings of Su-22 fighter-bomber, very agile
aircraft with landing speed double of that of CASA.
They wer used to the reaction time of Su-22 to a PAR
order "up" "down" "left" "right" witch was much faster than CASA...
Just my thoughts.
Nevertheless the icing hypothesis is still very probable.