Lots of interesting stuff here, but there is a bottom line. That is :
Unless you have 1500ft in anything swept wing forget it.
The wash off is just too great to get a stable configuration before 300-500 ft and you have got to get very lucky indeed to make a "non-fatal" touchdown after that.
Better to go with the "Old Rules". Land ahead in the best available area. Gear up/down is a matter of choice. Gear down would be better as it takes some of the crash load (surface permitting).
A controlled arrival onto bad ground is better than an uncontrolled one anywhere.
That said; we can screw around with the Sims all day long - and I have for years. However the numbers programmed therein are not reliable outside the normal operating params and it can be misleading to rely on them.
MG