Point taken...I can certainly see what you're saying. My comment was a little off-base for the message I was trying to convey and for that I apologize.
The box stock suspension setups Losi includes with their kits are aimed more at being "driveable" on a wider variety of terrain than what most race tracks electric racers would consider to be "normal"; hence the differences in the box stock setups of the BK2 and MF2 especially when compared to what is normally what someone would run at a typical racetrack. In the case of the XXX-4, adding $100 onto the price of the kit for items that may not be absolutely essential for someone to have fun with the car might not be the best thing for it.