I guess it's mostly qeustion for Laurent but I guess it's kind of useless/feature bloat and in 2.0 the rect is defined by left,top,width,height so if you want to move it, it's just 2 changes to left and top and in 1.6 it was defined by left,top,right,bottom so moving it would take 4 changes to each of these, which is a bit much already.
Edit: Again it's very Laurent focused question BUT it seems extremely unituitive to have right and bottom instead of width and height. And it makes getting width and height in 1.6 a pain if you're not careful and use two methods(2 more methods = more feature bloat).