After hundred of experiments and hundred of hours trying to fix the freeze/lag while touchdown I found the reason and its linked with the effects that are used by the sim when the aircraft touchdown in the runway.
What I did to fix the horrible freeze / stutter is:
In my MSFS instalation folder search for the following folders:
fs-base-effects-legacy/effects
fs-base-effects/VisualEffectLibs/Asobo/Base
Then I disabled the following effects adding an “OFF” in the beginning of each name, just like Im showing in the next images:
Doing this I fixed in 100% the issue, It took me MONTHS to find out the solution and I share it with all of you so you can have happy landings with NO sutter.
Of corse you will not be able to see the wheels effects (smoke, water, ice) when the wheels touchdown but who cares if we are in the cockpit during the landing!!!
Very important: Do not delete the effects files, just modify the name adding the OFF word exactly as I show in the pictures so you can comeback to the normal configuration at anytime taking away the"OFF" word from the files.