Thanks for your insight. I think the logic behind using those original variables, where you cancel out the wind entirely, though not realistic, has some merit.
At low speeds, crosswind is cancelled out because it is artificially disabled until a certain speed is reached, and gradually hits 100% strength as airspeed builds , and now the rudder becomes more effective.
At low speeds, crosswind is cancelled out because the weight of the aircraft, and therefore friction, cancel it out. Airspeed builds, rudder becomes effective etc.
Both statements are true, as I understand it, and both can simulate the same real world behaviour, but go about it different ways. The latter can mean need to use much more rudder than you think you would. The former means you might suddenly need rudder as airspeed builds, and both ned values to properly simulate that crossover point as the rudder becomes effective.