Sirab mate, no hard feelings but let me slowly explain you this.
White stones were/are based on levels, soo it was easy to add them, since they already existed that way.
Brown Boxes are simply stats change tools without any levels on them.
This being said, even if there is chance that they be made like levels and I doubt it, it would be lame since it would make game even more easier than it is already.
Farm legendary gears or buy them in AH and do kid budokai, or buy/gain brown boxes for your gear.
PS: It isn't like you will have only kid budokai character soo you will be that poor that you can't buy brown boxes.